Hyposalinity together with copper sulphate treatment   8/22/07
Dear Sir,
Your site is the best I have come across on the net. I have learned lots from your wonderful Site.
I have a question. Can one treat the marine fish while in hyposalinity with copper sulphate?
<Can>
What is the effects of copper in such a salinity.
<More toxic...>
Regards,
Inderjeet Singh
<Bob Fenner>

Re: Hyposalinity together with copper sulphate treatment   8/26/07
Dear Sir,
Thank you for the prompt reply, You have said copper can be used so should I keep a level of 0.15 mg/l as suggested or reduce it.
<I would maintain this as a minimum stated concentration>
Your second answer is not clearly understood by me. It will be toxic to what, the fish or the parasites.?
Regards,
Inderjeet Singh.
<The host fishes... the lowering of spg makes copper exposure more dangerous. BobF>

Re: Hyposalinity together with copper sulphate treatment  8/28/07
Dear Bob,
Thanks again, This is going to be a bit long mail so please do excuse me I am Architect turned Aquarist, this hobby has changed my profession I am a serious LFS hobbyist doing my job for past 5 years in freshwater.
<Neat! I too was self-directed to a life of enjoyment, study and sharing in our interest>
Here in India Marine is not much popular. Recently I visited Singapore for the Aquarama Exhibition .
<Ahh! Have gone to most of these biannual industry get-togethers>
I was inspired with Marine setups and the Underwater World.
<The UK co. I take it>
I set up my tanks for marine and got two consignments of fish sadly all the fish died within two weeks because of Velvet. Then I started to read and browse the net and I came to WWM. This is my favourite site. I spend most of my spare time reading your articles. I now give my fish the fresh water dips and am trying to quarantine them.
<Ah, good>
Now I have been successful to keep the fish alive. Your site is a big Ocean of knowledge.
<Thank you my friend>
The reasons of my earlier question is that I am confused and not sure what method I should use?
1. Only Hyposalinity ?
2. Only Copper treatment Or
3. Both 1 and 2 ?
<Depends a good deal on the species, specimens in question... For many that are sensitive or in bad initial health, neither may be appropriate... For incoming fishes, pH adjusted freshwater dips with a bit of formalin (as detailed on WWM) is my favorite prophylactic approach...>
Now, the reason I am asking you the above question is that I have set up 40 tanks of 15 gallons in circulation to a common sump. All tanks are individually connected with of 3/4" pvc pipes for inlet and outlet.
In the Sump the water is filtering through Ceramic rings, filter pads of different grade, bio balls. The water is then pumped back. I plan to quarantine marine fish in these tanks.
<Mmm, much we should state here... each of these tanks flows back independently I hope... and you have VERY good mechanical (one micron or less) AND physical (e.g. UV) sterilization to exclude the sharing of parasites...>
I read on the net that Protein Skimmer must not be used as the organic waste will remove the copper.?
<Yes... w/ or w/o the waste... and the waste alone>
I am using API test kits NH3, NO2, NO3, pH and Cu.
Do I need to monitor anything else? What method should I use from the above?
<Dips, baths... and keep good records of what species from what suppliers have problems... Arrange your ordering to reflect...>
Salt used is Red Sea as this is the only salt commonly available in India.
<As your business grows... do consider becoming a distributor for other brands... and product lines... Marine keeping will explode some day (and I think soon) in India>
I have prepared my own Copper Sulphate solution by mixing 40 gm.s of Copper Sulphate ( Blue crystals used in swimming pools here) to 10 liters of Distilled water. I intend to use 30 ml for 200 liters to get .015 ppm reading of copper.
<I would add 4-5 grams of citric acid to your mix here... much better... to keep the CuSO4 . 5H2O in solution>
I want your advice for any other precautions that I should take while Quarantine. My tanks are recycling now. And soon I shall add the fish when the NH3 and NO2 readings are ZERO.
Thanks once again.
Regards,
Inder.
<I will gladly help you in your endeavours. Life to you. Bob Fenner>

Re: Hyposalinity together with copper sulphate treatment – 09/01/07
Dear Mr. Bob Fenner,
I was very glad to see your picture in the October issue of Freshwater and Marin Aquarium magazine.
<Heeee! Got to get a newer one... for honesty's sake if naught else>
In the last mail you state "<Depends a good deal on the species>"
The species that I am keeping for the moment are from your good list of Butterflies,
<Ahh... this family does rate quite high on the copper sensitivity scale I'm afraid>
Earlier I tried keeping 8 banded butterfly
<The genus Chelmon?>
and it did not eat anything and finally died. Other species that I am keeping are Angels, Lion fish, Wrasse, Damsels, Triggers, Tangs and Surgeons.
Do you have a list on your site for copper sensitive species?
<<Mmm, yes... they are somewhat detailed by family/group as here: http://www.wetwebmedia.com/mardisindex.htm
scroll down to the royal blue line... the FAQs after the coverage on Crypt>>
"<Mmm, much we should state here... each of these tanks flows back independently I hope... and you have VERY good mechanical (one micron or less) AND physical (e.g. UV) sterilization to exclude the sharing of parasites...>"
I shall now be adding 16watt U.V. in the sump (Water vol: 100 gallons) with 2500 l/h power head. The flow of the pump is 4500 lts /ht to the tanks.
<I would add many more watts of UV here for this total volume and flow rate... Likely five times as many plus. Look for the Vectron (TMC) brand if you can... very reliable, service-able>
Two racks with 18 tanks gross volume of 1200 lts. I shall call this as System 1.
I have two such systems with 4 racks ie 36 tanks. System 1 (1200lts) and System 2 (1200lts). Here I need your suggestion. First, My plan is to have System 1 for Quarantine with Hyposalinity and Copper, if you suggest. And in System 2, Not sure yet but may be the following
<Just to be sure, you have two sump systems here correct?>
1. For invertebrates,
2. Curing live rock, Or
3. Use this system for Copper sensitive fish. ie only Hyposalinity.
<The invertebrates and LR should not be exposed to varying or low spg>
I have prepared my own Copper Sulphate solution by mixing 40 gm.s of Copper Sulphate ( Blue crystals used in swimming pools here) to 10 liters of Distilled water. I intend to use 30 ml for 200 liters to get .015 ppm reading of copper.
<I would add 4-5 grams of citric acid to your mix here... much better... to keep the CuSO4 . 5H2O in solution>
Sir, I want to know that add 4-5gms of citric acid to what quantity 10 lts or to 200 lts ?
<Yes>
Regards,
Inderjeet Singh Bansal.
<Bob Fenner>

Hyposalinity   6/25/07
Dear Bob:
I have a very perplexing question regarding the effects of hyposalinity. I have been in discussion with some members of my local reef club regarding hyposalinity as treatment. While I agree it is a mild (and questionably effective) treatment for certain pathogens, I do not endorse its use prophylactically (without cause).
<I as well>
The basis for my argument is the principle that while it may be mild, it is still unnatural, and therefore has a negative effect on fish. Again, not debating the degree of harm, I feel it will have some sort of negative effect. However, some other members disagree. They claim that such lowered salinities have no negative side effects whatsoever.
<Mmm... perhaps they should try a simple experiment, exposing their eye/s to varying degrees of water with different salt content, different osmotic pressure... IS a source of stress for sure>
My dilemma comes in the research supporting this data. There are many informal articles (such as Terry B.'s in this month Advanced Aquarist) which claim it has tremendous benefits. However, the references listed do not pertain to the "typical" marine teleosts in this hobby. In fact, many of the species listed in the references are estuarine species. To me, this extrapolation of data is unmerited. Furthermore, in reality, the negatives of hyposalinity are never quite addressed in such articles, just the positives. I am beginning to wonder if such consequences have ever been researched.
<Perhaps not. I note and agree with your use of the term "informal">
Using my own logic train, I cannot help but feel that any wild species outside of it's environment is at a disadvantage. But furthermore, in this case, I can't help but feel that the 200 million years of evolution have led to this species becoming quite specialized into living optimally at the NSW salinity, not hyposalinity. Furthermore, from what I can find, there is little or no recommendation for people to maintain fish only tanks at lowered salinities. If such benefits are so obvious and effective for hyposalinity, why hasn't this species migrated to hyposaline natural conditions?
<Many groups, species... likely individuals at times... "have"... there is a degree of euryhaline et al. tolerance in all life... some more so, variable than others... Sorry for these gross generalizations as well... but the point is there are coping mechanisms, organisms that easily transit temporarily to more... twixt fresh, marine settings...>
Personally, I have anecdotally witnessed what I believe to be more severe side effects from hyposalinity at one of the major stores locally. They run all of their fish holding systems hyposaline, and they have worse HLLE that anywhere else I have seen- especially in Red Sea animals, and large angels.
<Ah yes... and my "old saw" re such practice... it is cheaper (less synthetic or hauled natural seawater, higher DO, lowered ext. parasite loads... But... how much lower spg/salinity? How much benefit?>
At any rate, to my question- what, if any, negatives do you see running hyposalinity to hold?
<There are a few ways to approach, discuss this... in terms of hematology (fishes have about the same types of cell types, chemistry, metabolism here... just much higher packed cell volumes...) the effects can indeed be dire... Lowered hematocrits are big trouble... with little oxygen to be had period... And other sources of stress... social, collateral shipping trauma/damage...>
By that, if an otherwise healthy fish were subjected to hyposaline conditions, would it be better off, or would it suffer some negative side effects?
<All a matter of degree...>
Would you consider prophylactically running hyposaline quarantine for EVERY fish, despite the symptoms shown?
<No... though in actual historical truth, I/we used to do just this in our stores (I was a retailer off and on for decades... "on the floor" for some 14 years...)... as you state, some notable examples would be Red Sea fishes, other e.g. fishes that live in close association with invertebrates (e.g. Amphiprionines), seahorses and kin... many Callionymoids... "don't like" such exposure... are FAR better off being kept in NSW cond.s.>
Are you aware of any literature which has specially and applicably been done with ornamental marine teleosts?
Jeremy Maneyapanda
<Unfortunately not "off the top of my head", but would like to (next run down to SIO library) to try a go at computer searching such a tropic. Am pretty sure some tangential (not pet-fish per se) investigations re this and related issues have been pursued scientifically. Are you near S. Ca.? Would you like to go with re such a bibliographic search? Cheers, Bob Fenner>

Re: hyposalinity - 6/25/07
Dear Bob:
<Jeremy>
Thanks for the reply. Unfortunately, I am in Georgia, and don't think I could get into a road trip of that degree! I, too, will begin looking into some online sources, despite my lack of success from previous efforts. please let me know what you find, and I will surely do the same.
Jeremy Maneyapanda
<Thank you for this. BobF>

Re: Clownfish Growth?   3/18/07
Bob:
<Michael>
Thanks for the reply.
<Welcome>
One last question -
Did you mean that you are not a fan of low salinity quarantine or that you're not a fan of your book? :)
Michael
<Heeeee! Just not hyposalinity during quarantine. BobF>

Anthony Question on Hypo and FW Dips  - 3/12/07
Hi Anthony...
<Mmm, not here... maybe try him at Marine Depot, or Reading Trees (.coms)>
you recently has a conversation with some friends of mine when you appeared in Florida and mentioned that you don't think hyposalinity is a viable option for treating ich. I've also read where you don't feel that Greenex should be used in treatments. Yet, Bob has stated that Greenex actually works to offset some of the negative aspects of Formalin treatment.
<What? ...Malachite and Formalin ARE Greenex... The former does nothing to "offset" the latter... both are harsh, toxic... more so together than separately>
I've also noticed that Steven Pro highly recommends hyposalinity as a treatment for ich. Wow, so confusing!
We met at IMAC last year. I own Sea in the City in Orlando (you encouraged me to frag my red carpet anemone...which I did with great results by the way;) and I've been working to get away from using copper in my fish displays (I have quarantine/hospital setups in use) and have settled on oversized UV, Ozone and lowered salinity (1.20) in the tanks.
<Good approaches...>
I dip all fish that can tolerate freshwater in a 5 gallon bucket with a heater, bubbler and PH adjustment that contains Formalin and Greenex (1-3 minutes).
<Good... though I/we mainly just used Formalin... for decades>
I then move them to same setup on the bucket but with salt water, Formalin and Methyl Blue (30+ minutes).
<Neat>
I'm having excellent success with this (pulled from some of Bob's suggestions in "Conscientious Marine Aquarist") but now have some hesitation after reading some of your WWM replies regarding Greenex. So, can you help me out with some qualifying info? Thanks and hope all is well with you. Marcye
<Do please give the URL/s a once-over and write me back re your concerns. Bob Fenner>

Swollen blenny, NNS  2/1/07
hello everyone
<Javier>
I've been keeping a midas blenny along with other fish in a quarantine for almost a month now.  Since I am treating for ick, I have them in hyposalinity.  Everything was going well with no major water quality problems except a few tiny drops in ph here and there, but two days ago I noticed my blenny appeared swollen.  His fins, abdomen and everything looks puffy, and he is looking a bit pale in color.  Any possibilities of what it could be? Thanks
Javier
<Is likely just a reaction from the low-salinity exposure, pH shifts... I would move this fish, pronto, to a better setting. Bob Fenner>

Re: Ich & a fallow Reef Tank ... Hyposalinity and marine invert.s   11/26/07
Bob:
Again, thank you very much.
I know that you've heard several time how respondents have wished they'd known of you and this web site earlier in their hobby exposure, but it's most definitely true.
<Ah yes... I do wish there were such tools as WWM for many other fields of endeavour (for me, gardening, world peace activities, information... it's coming>
This is a quick request for amplification/verification:
With regard to running my main tank at a lowered SG (1.019 - 1.020 for invertebrates I believe most of your responses/articles say, but I've seen other numbers in the FAQs - maybe for fish?)
<Yes... By and large I would not "fool" much with lowered spg with invertebrates period. Fishes can tolerate much larger, faster changes here>
and heightened temperature (83 deg. F?), am I correct in my understanding that my inverts can withstand those parameters for a month?
<Again, I would not move the density of water here much if at all>
In my 120 gal reef tank I have (sorry, I don't know their scientific names)
live sand and rock,
3 giant cup mushrooms,
3 Ricordea mushrooms, 2 Foxes,
a pipe organ, a _________,
a Chile,
2 cat's eyes,
2 moderns, a Xenia,
a gorgonian,
a Christmas tree coral,
a frog spawn
and a toadstool for the corals;
3 sponges,
2 Squamosa clams,
2 blood red fire shrimp,
2 scarlet Skunk Cleaner Shrimp,
1 pencil urchin,
1 porcelain anemone crab,
1 hitch-hiker crab,
1 Tiger Pistol Shrimp,
several:
Scarlet Reef Hermit Crabs,
Dwarf Blue Leg Hermit crabs,  
Turbo Snails,
Cerith Snails,
Astrea Conehead Snails,
Nassarius Snails
and money cowries
Thanks Again
Regards
Teri Hewson
<I'd leave the main tank at 1.025 density. Bob Fenner>

Hyposalinity vs. ich   9/30/06
   I sure hope you guys can help me with this problem!! I've read a lot of information in your FAQ and throughout your site about hyposalinity and believe I did it correctly.  I'll outline what I did, what the results were and finally the problem.
<I have had mixed results with hypo and ich. For fish that don’t tolerate copper well it has worked for me when combined with 50% daily water changes over a 4 week period a majority of the time.>
   I have 3 saltwater tanks.  2 were originally reef set ups and 1 was for growing macro, pods and sort of set aside as a QT tank if needed.  The problem is in my 29 reef.  This was my first attempt at saltwater.  I spent almost 2 months cycling it before adding any livestock.  My first addition was 2 Percs.  Everything was going along just fine until they came down with
Ich.
<Were these clowns placed in the QT for at least 3 weeks before the introduction to the 29?>
  I went through the following steps of hyposalinity. First, I removed all corals and snails from the tank and put them in a 46
bow tank that's been doing awesome ever since I set it up.  Over a period of about a week, I lowered the salinity to 1.009, which I measured using a hydrometer that I regularly calibrated, using distilled water.
<Ah, a couple of problems can arise from doing a hypo treatment in the display tank. I'm assuming there was still rock and sand in the tank which provide those nasty little ich a place to settle during their cyst stage where they can develop for up to a month. In a bare bottom QT you can vacuum the bottom during water changes removing a large number of these cysts. The second problem stems from the ich having a viable host still in the display tank. You really want to leave the tank fallow (fishless) for at least 8 weeks so the large majority of ich will die from lack of hosts. This is another benefit of the QT. I know it sounds like a pain, but it is truly your best chance of success.>
  I topped off
the tank every day with fresh water.  I also tested the salinity every day.   It never went above 1.010 and was almost always at 1.009.
<Where you performing large water changes at least every few days? A 50% water change (temp, salinity, ph matched) daily or even every 3rd day will reduce the number of free swimming ich as well as cysts you can vacuum up off horizontal surfaces. This can also help mitigate any water quality issues that may be stressing the fish.>
Within a couple of days, 1 Perc. died.  :o(  Within a few more days, all visible signs of the Ich were gone.  I kept the 1.009 level for about 6 weeks.  While in the hyposalinity state, I did purchase another Perc to replace the one that had died.  I reasoned that this would be the best time to add any fish since it'd be similar to a quarantine period.
<errr…bad idea. The new fish could’ve been carrying something worse than ich, and the stress of acclimation may make the newcomer even more susceptible to disease.>
I made this addition during the second week of hypo.  After about 6 weeks, I slowly (over a 10 day period) raised the salinity back to 1.024.  Within a week of reaching 1.024, both Percs showed signs of Ich again.  What did I do wrong?  
<See above>
I'm contemplating tearing that tank down, giving the live rock a freshwater dip while scrubbing lightly with a toothbrush, rinsing the live sand in freshwater and starting over.
<A bit extreme. See below>
  I don't like the idea of having to go through the long
cycling period again but also want to get rid of this Ich problem before I loose any more fish.  Oh, I forgot to mention that both Percs died within a week of the return of visible Ich symptoms.  The only fish in the tank now is an ugly PJ Cardinal that has kicked the Ich both times.  I only say Ugly because they look like a fish that God created out a bunch of left over parts...lol.   The PJ appeared covered with the Ich and much more infested
than either Perc but always acted totally healthy.  The PJ has not shown any signs of Ich for a couple of months now and is still nice and healthy.  As I mentioned, the PJ is the only fish in the 29 along with a bunch of Nassarius snails I've recently added.  If I take the drastic steps of starting over with the 29, I'd put the PJ and the snails in the 46 gallon.
<Consider the PJ an “Ich Transport Device”. Moving the PJ without at least a few weeks in QT with some freshwater dips thrown in to be safe will likely just introduce the problem to your 46. Your best bet is to move all fish in the 29 into QT (cheap 10g tank with heater, sponge filter and some pvc pipe terrain) and leave the 29 fallow for 8 weeks. When all is said and done the 29 will be ready to accept healthy fish from QT without traumatizing the rock and sand. Just remember that if you add more fish without QT’ing them first all your efforts may be in vain.>
This entire time, the only problem I've ever had with the 46 has been an ongoing battle with Cyano.  I think I've won the battle by the addition of a powerhead to create more flow in the area the Cyano always appeared.  It's a thriving tank with happy fish, corals, shrimp, snails and a RBTA that recently split.
   Any suggestions on how to overcome the problems in the 29 would be very welcome.
<I have been through similar situations in my early days of marine aquaria. When I finally got around to quarantining everything (even corals get a couple weeks of QT time) before placing in the main display, as well as using QT when dealing with disease life become so much simpler.>
  I want to have it healthy and beautiful again!!  Thank you so
much!!
<I hope the best for you and your reefs! Emerson>
Sincerely,
Michael

fish <and English> problems  - 09/13/06
hey-  Bob
big fan of site cant express how much help it has given. I've been in the hobby 3 years or so. Now i have 120 reef. My fish seemingly are always getting ich. There are 2 fish who always seem to get it and the others don't seem to. The 2 that get it are powder brown tang, and blue hippo. I know tangs get it easy but what am i doing wrong. no fish have been added and i haven't lost any. But they always seem to have a few spots here or there. Now the powder brown has is really bad but - doesn't act any different, eats fine and doesn't flash or anything. So I'm baffled. It starts out really mild one or two spots and then something happens like i have to clean the tank the he gets a little stressed and gets a few more for a few days. Then after that goes back to only a few. I just got back from vacation and now he has it very bad. but no change in the way the fish acts. I know i need to take them all to sick tank but what do i do to keep from getting it again. Water quality is fine, temp changes very little maybe 1 degree a day. I've taken them to sick tanks 2 other times once for 4 weeks and the other for 6 weeks. I guess what gets me confused is that a few fish will get ich and the others are untouched and fine. I just don't know what I'm doing wrong.
fish in tank
Powder brown
purple
Kole
hippo tangs
royal Gramma
4 green Chromis
flame angel
tiger goby
<<Blake:  The best treatment for ich is to slowly lower the SG in your QT to 1.009 (as measured with a refractometer), leave it there for 6 weeks, and then slowly raise it to your main tank SG.  Unfortunately, for you, ich needs a host fish to survive the 6 week period.  Thus, if you leave any fish in your main tank, you will never break the ich cycle. If you don't have any live rock or inverts in your main tank (because the SG 1.009 is too low for them), you could do the treatment in the main tank.  If you do, you could pull them out of the main tank, and maintain them in a separate tank while you treat the main tank.  I usually don't like to move the SG more than .002 per day up or down (as measured with a refractometer).  After the 6 weeks, no ich will have survived in your tank.  You then slowly raise the QT from SG 1.009 to where your main tank is.   While the whole process takes several weeks, you will beat ich for good.  In the future, never introduce a fish without going through the 6 week QT. It's the way I do it and I have never had ich in the main tank (though I have had it seen it many times at the start of the QT process). Best of luck, Roy>>

-Tank is Ill-  8/28/06
First of all...you guys are amazing....
I'm sure I speak for everyone when I say....Thanks!
<Thank you, we try to do what we can with what we have.  I believe Bob said something about sharing the wealth of knowledge makes everyone a better aquarist :)> <<Indeed, the world a better place. RMF>>
I have an 80 gal aquarium with an eel, a lionfish, a small puffer, and an angelfish...
First Question - IS this tank too small? I know that Eels can get very large, as well as puffers....I may need to upgrade to a bigger tank....?
<Yes, even without listing what specific types of the fish are, all eels get a foot at least, the lion at least 6-8 if its a dwarf, 18"+ if not, ditto for the puffers and angels 6 inch minimum full growth, and even at small sizes they still put out waste like their adult sizes.>
Second....been fighting ich for a few weeks with little success. Puffer wont eat, lionfish has cloudy eyes, etc....I first moved them to a smaller quarantine tank because its all I had. However, its too small to keep them in there for much longer. I raised the temperature of the tank to 81 degrees, lowered the salinity to 1.016 and also added a small amount of "Copper Power"....
<Uh oh.....>
Now that I have researched your site, I see that for hyposalinity to be effective, the reading should be closer to 1.010 correct?
<1.012 ish is fine, but yes, has to be lower.>
Is the temperature about right?
<I would bump it to 84 ish, but without knowing more about your fishes size, and the size of the Q/T, the higher the water temp the less oxygen there is, so you might suffocate your fish.>
Also. Although my LFS told me that they run Copper in all their tanks and assured me that it wouldn't be harmful to my fish...I see that Copper can be extremely bad for Puffers and Lionfish...correct?
<Jawohl.  Copper is a very powerful medicine, that requires a test kit usually,  Each fish tolerates it differently, and puffers and lions are on the very short end of that.  All naked gill fish don't do well in copper at all long term, and sick fish fair worse.  Your LFS probably has their copper at 2ppm or less, which is considered therapeutic, but you need to be higher usually to kill ich, 10+ppm.  you can read about copper and puffers on pufferresources.net>
What do you suggest I do to address my ich problem then? Out of frustration, today I emptied the main tank, cleaned it thoroughly, and decided to "Start over". Can I do something as simple as move all back into the main tank once established and perform hyposalinity with a temperature raise there? I am buying all new crushed coral and decorations, so hopefully there won't be much residual copper...
<You can, however, there is no point to letting your 80 gallon get established only to kill all the bacteria by doing hypo salinity.  I would remove everything from the 80gal that was dosed with copper and toss it.  put your fish in that bare bottomed with no decorations (just the fish and the filter heater etc) and lower the salinity over a week (.02 per day or two at each water change).  Do daily water changes to keep the water quality up, and keep that going for a week or so.  See if there is improvement.  You will need to gravel vac the bare bottom of all white dust you see when you do the water changes.  2-3 weeks and you should be totally ok.  Re-add substrate once your fish are cured for over a week.>
Lastly....the puffer has not eaten for about three weeks. I read here that they can survive that long...and even longer if necessary....but I am worried. So, regarding the force feeding....I have krill, cockle, and garlic for starters? How far should I insert the syringe/turkey aster/whatever to insure he doesn't just spit it back up?...and how do you get the pieces small enough to be sucked up by the feeder? (He's only about 4 inches and mouth is actually too small for a turkey baster..)
<At this point the copper and ich have probably ruined its appetite, you can add garlic to the foods to entice it to want to eat, but getting the water quality stable and clean, and getting the fish into uncoppered water is your best hope for their survival.>
Thanks so much..
Russ
<Hope that helped>
<Justin>

Marine Ick Treatment - 08/06/06
Hi Bob,
<<Hello Poulo...EricR here this morning...>>
This is Poulo here.  Let me get straight to the problem...
1. Standard 55 gallon tank with DSB of 4-inches with UG filtration @ 1100 lit/hr
<<Mmm, not a "true" DSB if employed over an under-gravel filter.  The under-gravel filter can also become a detritus trap...best to remove in my opinion>>
2. Sump of 40 lit
3. Fish only tank without live rock
4. The fauna: 1 X Saddleback Clown, 1 X Three-lined Butterfly, 1 X Coral Beauty Angel, 20 X mix of Turbo/ Babylonia snails, 2 X medium sized Blue-legged Hermits, 1 X CAMEL SHRIMP
The main problem.... the Coral beauty and Butterfly are loaded with ICH, while the Saddleback is not.  I would like to ask you whether I can treat them with hyposalinity + elevated temperature, after removing the Hermits and Snails.
<<No, you need to treat these fishes with a copper-based treatment...and NOT in the display.  Best to remove "all three" fishes to a treatment tank and let the display system sit fallow for six weeks (please read here: http://www.wetwebmedia.com/ichart2mar.htm)>>
The second problem...  It is going to be mindblowingly difficult to remove the Camel Shrimp because of lots of porous base rock. Can he handle the low salinity?
<<Not recommended...Don't try this>>
Or what are the best suggestions you can give.
<<As previously outlined>>
Regards,
Poulo
<<Cheers mate, EricR>>

Re: Hyposalinity - 8/1/2006
Wow what a fast response!  Thank you!
<<You’re welcome.>>
Yes, my tank is six feet long.
<<Great to hear.>>
So, hyposalinity, huh?  I've read conflicting opinions on that treatment.  It does appeal to me, though, as it sounds like it would be the easiest/least stressful thing to do.  What is the proper way to execute said treatment, specifically at what rate do I lower the spg, how long do I leave it low, how quickly do I bring it back up?
<<In a QT tank, I drop the SG to ~1.016 over a few hours/days, and leave it there for several weeks.  I then raise the SG by .002/week and observe.  When dropping the SG, you must keep a firm eye on the water parameters, as the biofilter can crash with a rapid change.>>
Have you yourself used this treatment?
<<Many times.>>
Sorry for the barrage of questions, but I really don't want to kill another one of these fish!
<<I understand.>>
I feel awful about the other one.
Thanks again, fish guru.
<<Now way! Glad to help. Lisa :).>>
Elise

- Adding fish during Hyposalinity treatment 7/24/06 -
Hello, I have a question regarding my tank.  I have a 240 gallon fish only tank that has been setup for about 3 months now.  I added a fish about 2 weeks ago from my quarantine tank that I treated for ich (obviously not long enough) and rest of the fish in the 240 gallon tank got ich.  I began hyposalinity on the tank right away and the fish seem to be on the road to recovery.  I plan to leave the tank in this condition for 6 - 8 weeks.
My question, would now be a good time to add my next fish to the tank or should I wait? <Not really - any time you are treating for disease, you're best off not adding anything new until you know for certain that you're out of the woods.> It seems to me that if I am already treating the tank it would be a good time to add a new fish.  If so, how would be the best way to acclimate  the fish to the hyposalinity treated tank (S.G. at 1.009)? <Egads - that is a little too "fresh" - I wouldn't run your tank much lower than 1.015 for a hyposalinity treatment. Cheers, J -- >

- Ich never to cease and barrel-rolling boxfish 6/23/06 -
Hello WetWebMedia Crew! <Hello.> I'm an avid reader of your site! I hope you can help me like you've helped so many others. I have a 55 gallon tank with a male and female spotted boxfish, and a lionfish. Up until last week, it was just the female box and lion--both were eating and doing fine. However, I did notice some ich spots on the female box, so I removed the live rock, (considering this was a new tank, I left the base rock in, as I believed it didn't have enough time to have any of the nitrifying bacteria on it) and lowered the salinity down to about 1.011. The tank was left like this for a week, and I thought the ich had gone. Last week I added a male boxfish, quite a bit bigger than the female, to my tank by acclimating it in a separate quarantine tank to get it adjusted to my current salinity. Well the fish was added, and every one went back to their normal fish lives. However, the new male boxfish hasn't eaten a bite of food since I've gotten him more than a week ago. I've offered frozen and fresh mussel, a blend of frozen algae, Mysis and brine shrimp, Marine Cuisine, krill pieces, algae sheets, etc. It has thus far refused them all, but the female continues to feed eagerly. I wanted to try live black/bloodworms, but my LFS won't be able to get them in until next Tuesday. Anyways, the ich has come back within the last few days and viciously attacked both boxfish, covering them completely. They also both seem to have somewhat cloudy eyes, and the male will swim, and then do half of a "barrel-roll" in the water. Sometimes he'll swim down towards the rocks and do this, but he doesn't rub against them. So today I was reading around on the internet, and found somewhere that said hyposalinity wouldn't be effective unless the salinity was at 1.009. Well it made sense to me, since I've had the salinity at 1.011 for a good week, maybe more, and the ich was still there, strong as ever, so I did a water change and lowered it yet again down to 1.009.
As we both know, it would be very unfortunate for one of my boxfish, (more than likely my male, as he's the one not eating and rolling around), to die and nuke out the rest of my tank. Is there anything I can do to get him to eat and make his odd behavior, as well as the ich on both boxfish go away? <How about bringing up the salinity to something marine fish can tolerate without excessive stress?> A hospital tank really isn't an option, as the only other tank I have at the moment is a 10 gallon quarantining a filefish, and both boxes would probably get even more stressed being in that small of a tank. <As opposed to the stress of 1.009 salinity?> I really thought the ich would have gone by now, maybe not out of the tank, but at least off the fish.... Please help! <This situation sounds to me like what they call "A one legged man in a butt kicking contest." You've got too many things going on here that you are the point of doing more harm than good. It is my considered opinion that there is likely nothing you can do for this one box fish - it is dancing what is known in the hobby as the spiral of death, and if has not yet passed on, it will do so soon. I would even go so far as to suggest that you preempt this fish's suffering and freeze it and move on to solving some other problems. Hyposalinity is useful as a bath/dip but not as ongoing treatment. Saltwater fish actually need the salt - they drink their water and use the salts to regulate things inside their bodies. Without enough salt, things go wrong from the inside out and you find yourself where you are now. Preventing ich is as much about managing stress as it is killing parasites and if you only work on one side of this problem, then you're likely to never solve the problem. Consider doing this - put the remaining boxfish in with the firefish in quarantine. Try to get the salinity up to at least 1.018 (and very slowly - not all in one day). Then, let your main tank go fallow - no fish - for at least one month, six weeks would be better. Likewise, slowly bring the salinity back to a normal range in the main tank (1.023-ish).>
Thank You!
Neil
<I suggest you read here: http://www.wetwebmedia.com/mardisease.htm
Cheers, J -- >

Deleterious Effect of Hyposalinity? - 06/02/06
Thanks for your web page and all the valuable information it contains!
<<We're happy you find it useful>>
I have a question regarding the salt level and its relationship with macro algae.
<<Okay>>
I have my salt level @ 1.014 - 1.016 to hinder parasites (per a very reputable fish store in our town).
<<Yikes!!!  Reputable or not, this is not healthy/suitable for a display system for the long term, is certainly harmful to a reef system, and may not be as effective/helpful (all things considered) as you believe.  Please read here (http://www.wetwebmedia.com/martrthyposalfaqs.htm) and among the links in blue.  I strongly recommend you (slowly) raise the salinity up to natural seawater levels (1.025/1.026), and rely on good/better husbandry practices to keep parasitic infections/infestations in check>>
I have Cheetamorpha (sp)<<Chaetomorpha>> growing like gang busters and harvest it regularly, giving it to several pet stores in our vicinity for the last 6 months.  However I cannot get Caulerpa to survive in my 70 gal. display tank.
<<As a single-cell organism the Caulerpa is likely more adversely affected by the low salinity>>
Parameters are in check with the possible exception of low salt level.
<<Indeed...way too low>>
I'm not sure if the 2 algae are fighting each other,
<<Another option/consideration...yes>>
if the low salt level has a detrimental effect on Caulerpa, or is does the Caulerpa go asexual with the lights not being on 24-7.
<<This too can be a problem>>
No Algae eating fish in the tank.
Appreciate any help and keep up the great web page!
Steve Schollmeier
<<Thank you for the kind words.  Regards, Eric Russell>>

Epsom Salt + Hyposalinity + Kordon's Ich Attack -- OK?    3/2/06
Hi Bob & Crew,
   <Cam>
  Thanks for such prompt response on my earlier query on Epsom salt in Main Display Tank, to treat my red bar Anthias' pop eye. Your response endorsed it. Appreciated!
   Well, thing get rough here. Is it Murphy's Law (bad things happen together...??)?.
<Events do seem clustered... perceptually>
My emperor angel has developed Ich, I suspect. It is certainly not air bubbles but white dirt/dots on head and fins. I think some get onto one eye (looks dusty). Its breathing is OK still. Still happy and eats like pig. I did a 7 min fresh water bath on it today, hoping to relieve it from the parasites attached. I see some dropped off but some still remained.
   I have been doing speed reading on your site & hoped to adopt the following procedure to treat the tank and emperor to tilt the balance of health/disease in our favor.
<Good way of putting this>
I intend to effect hyposalinity (1.018) + Higher temp (mid 80s) + Kordon's Ich attack (hope it works as it claims --) for the tank, which is the main display tank.
   Side note: I have treated emperor angel with copper in the past. It developed HLLE after the treatment and I really hope I don't have to do it to this emperor angel which is still HLLE free. Besides, I have an infection in main display tank. I have to control it in main display tank.
   <Yes>
  Before I take the plunge, I would appreciate further clarification from your vast experience:-
  1. If I have to put Epsom salt to treat my red bar in a hyposalinity tank. Is it alright?
<Should be, yes>
  2. What's your view on Ich Attack.
<The Novalek product?: http://www.novalek.com/korgd20.htm
Only out of blind respect for owner/mgr. Bob Rofen do I give this some chance of actually working... I don't believe he would be part of selling "a pig in a poke".>
You mentioned that its is worth trying in your previous response to one hobbyist who asked similar question. Does the response still hold today?
<Mmm, I would not use this product myself... nor endorse its use in your circumstances>
  3. I have 2 cleaner shrimps in my main display tank. do you think 1,018 SG salinity is OK with them?
<No... will likely cause their demise>
  4. How long a period for a hyposalinity treatment is deemed optimal? 2 weeks or 4 weeks? Trying to seek a balance that most parasites are controlled/weakened and fish/shrimps do not have to suffer for long.
   <... am not, NOT a fan of hyposalinity for actual, advanced (discernible) parasite treatments... As you will find by reading WWM, print works by myself>
  Thanks in advance for your help. I am really grateful that you set up such useful site. I also own your books. Great work!
     Best regards.
<I do wish you well... to cut to the proverbial chase, I would remove all fishes, treat with a chelated copper solution... Bob Fenner>

Hyposalinity vs. Copper  12/22/05
Hello WWM crew, <Hello Misty>
Looking forward to seeing and meeting some of you at our Next Wave Conference at the end of January here in Dallas.  I owe you all some
in-person "thank you's" for the past four years of advice and help.
<We look forward to that>
Anyway, the decision at hand today is treating ich with hyposalinity vs. copper.  I've been lucky to not have to deal with ich for the first four
years as a hobbyist.  I guess my time is up on that front. <We all get a turn at one time or another.>
I have a Kole Tang that has had a break-out.  The only other affected fish is my bi-color blenny - right now at least.  Of course, all of this
happens two days before I leave town for the holiday (I leave this Friday), but my husband will be in town to carefully administer whatever
regimen is necessary (this being the same husband who turned off the lights on my fuge a couple of years ago for 4 days because it bugged him
while he was watching TV...hmmm). <Ah, husbands are like wives.>
So, if you are in my shoes, what would you do?  I've heard about tangs vs. copper.  I've heard that copper can be more effective than
hyposalinity.  Here's what I have to work with immediately:
120-gallon display tank containing inverts and the following fishes:
1 Banggai Cardinal
1 Bicolor Blenny
2 False Percs
1 Target Mandarin
3 Green Chromis
1 Kole Tang
29-gallon baby Banggai grow-out tank, with a one-year old "baby" in it - so it's cycled and ready to go, has a Remora skimmer, too.
Empty 75-gallon tank
My initial thought is to remove the affected fish immediately to the 29-gallon and begin a treatment of some sort (would appreciate thoughts on the best treatment option).  Then, when I get back into town (next Monday night), set up the 75-gallon tank and remove the rest of the fish from the display in order to give them a bigger QT/treatment tank and allow for the fallow period of the display tank.  If the other fish are not affected, then I could possibly put them in the 75 and only have the affected fish in the 29 as well.  Thoughts?  Advice?  Magic potions?
Thanks again, in advance.  I owe you a cocktail when you get to Dallas. <Always nice to be on the receiving end.>
:-) <Misty, I'd put the affected fish into the 29, remove the skimmer using a power head for circulation and begin (immediately) treatment with a chelated copper (Copper Safe) as I'm thinking your husband is not going to test copper levels and adjust on a daily basis if you use the non-chelated form, and, you may not want him to.  Then I'd follow your plan of relocating the remaining fish into the 75 and let the display go fallow for a month. You may very well end up treating all the fish in the 75 as others will probably be infected.  I'm posting a link on the subject for your reading.  http://www.wetwebmedia.com/ichartmar.htm  Good luck.  James (Salty Dog)>
Kind regards, <And Happy Holidays to you>
Misty Johnson

Re: Hyposalinity vs. Copper...decisions, decisions 12/24/05
Thanks so much for the quick reply. <You're welcome.>  Another quick question - what if catching the tang is his doom vs. trying something else?  He was hiding
out last night in an alley between two live rock sections. <If the ich is visible and nothing is done to correct it, he will be doomed anyway.  At this stage its much less stressful on the tang if he were by himself.> So, I did what I could and picked up a cleaner shrimp and "Marine Max" -
as recommended by my LFS based on his prior experience with the product and a yellow tang in a new tank with ich. <The cleaner shrimp isn't going to eradicate the parasite.> I picked up some Garlic Xtreme as an appetite booster, <This helps.> since Mr. Tang is looking a little thin as well. IF I can catch him without really stressing him out to his doom, I already have the Copper Safe ready to go.  The blenny shouldn't be a problem to catch since he shows up for feedings with the rest of the
dogs. <About the only choice you have is to remove the rock and catch him.  Chasing him all over the tank with a net isn't going to improve health matters.  Much easier to QT before adding fish into the display tank.>
I think I'll owe myself a cocktail, too, after all of this :) <I usually have one as a prevention.  James (Salty Dog)>
Misty Johnson

Toadstool Reaction to New Cnidarians' Presence, & Trying Hyposalinity Half-cocked  11/23/05
Hello,
<Hi there>
I have two unrelated questions, the first is regarding a small toadstool coral which has been in my 135 gal reef for about a month now. It was doing well until this last Saturday, when I received a large order (about 21 corals) which I purchased online.
<... to go in a very large or a few systems I hope>
Since then it has not expanded its polyps, and the cap has a 'shiny' appearance. There is no mucus layer or anything causing it, it just looks shiny when light glances off of it. It is not near any corals which have long sweeper tentacles.
<Are near all chemically>
The only corals within six inches of it are a Montipora, yellow Fiji leather, and Blastomussa wellsi, none of which
could possibly be reaching it to sting it. I am beginning to wonder, however, if when I was placing my new corals I didn't happen to brush something up against it. The most likely candidate for this would have been a torch coral, which is on the same side of the tank, but about a foot away and at a different level in the tank. 
I also moved the coral about four or five inches, placing more closely under my MH lights, although I can't imagine this would cause it to stop expanding. Every other coral in the tank is doing fine, even those far less hardy than the toadstool, so clearly there is something wrong with it. If it was stung, will it likely recover?
<... Please read here: http://www.wetwebmedia.com/cnidcompfaqs.htm>
It certainly doesn't appear to be dying or falling apart, it just isn't expanding. 
Second question is regarding ich in my fish only tank. I am going to attempt using hyposalinity/increased temp exclusively to get rid of it. I am not going to be able, however, to put the live rock anywhere else (certainly not in my reef tank), and as I understand it this will kill off beneficial shrimp, mollusks, etc. My question is, will it leave the coralline algae and
bacteria necessary for waste breakdown intact? 
<... likely not>
If so I can always seed the tank in later with live sand and rock from my reef tank.
Thanks,
Frank Janes
<Study a bit more Frank... re hyposalinity treatment, alcyoniid compatibility, behavior... All posted on WWM. Bob Fenner>

PO-ed at QT... lack of worth of lowered spg in disease treatment  11/17/05
I'm extremely frustrated, and wonder if you might be able to help clarify or suggest a way out.
<Will try>
I never, ever used to QT. I had my very first losses to saltwater ick with new fish in early October and was excoriated by many, though I know for a fact that many shared my opinion that the multiple moves from tank to tank, etc, was more stressful than the move straight into the display.
<Can be>
Fine.  I set up a 20gal QT -- largest I can do. Used no water from the main system. Did add one rock from the sump.
<Tantamount to the same... contamination, introduction...>
Added a 2.5" Kole and a 1.5" hepatus on 10/27. Water at 1.017. By 10/31 was at 1.009. 
<Too low initially, too much lower too quickly>
Calibrated refractometer, recalibrated every other day or so. Salinity checked 2x daily, changing out 4gal or so daily. Temp 79.  I inspected the fish MANY times at great length over the next several days, they were entirely clean to the
eye, not a single spot anywhere on either. 11/8, in the morning there were several ich spots on both. This was after 8 days at 1.009. 
By that night they were all off. I figured great, the low salinity water would zap the tomonts and I should be home free.
<... am not a big fan of hyposalinity "treatments"... as you'll see>
No spots at all for the next several days until 11/15.  Several spots, definitely ich, on the Kole. Many, on tail, fins and body.  How can that happen? They have been in there at .009 for 15 days now? Water has not veered from 1.009.
<... Please read here: http://www.wetwebmedia.com/martrthyposalfaqs.htm and the Related linked files above...>
I change out 4 gallons daily, siphoning off the bottom any leftover food, etc. Nothing is shared from the display, not buckets, siphons, nothing. Plus, I am feeding the "Seachem recipe": Metronidazole and Focus mixed into frozen food, covered with garlic. I've added several drops of Gel-Tex PX to guarantee the medicine adheres to the food. The fish go nuts for it. 
Ammo zero, pH 8.3, temp 79.
All this hype about hyposalinity QT being a must for new additions --
<Not from me>
right now I am seriously dubious. Looks to me like the stress of the hyposalinity is causing the ich outbreak, not stopping it. Why would it still be there after 15 days?
<Possibly, evidently>
Any advice, assurance, assistance would be most appreciated. 
<Read on WWM re quarantine, dips, treatments, parasitic and general disease period... Use an appropriate (in my opinion, copper-based) medication with testing... not hyposalinity. Bob Fenner>  

Re: PO-ed at QT  11/17/05
Thanks Bob.
<Welcome>
Aaaarrrggghhh. Everyone has a different take on this.  Sorry to post the question -- I didn't realize you were a copper as opposed to hypo advocate.
<Am... strongly. As you have seen/will see, we have quite a few "data points" in this regard, direction>
Anyway, I started at 1.017 because that was the s.g. of the LFS where I got the fish (and most LFS are around 017 or 018 in their fish systems I have found).
<Yes... and the valid reasons for this are posted... as are the arguments for keeping seawater near natural strength>
My research on another popular reef site indicated dropping the level by one to two points a day, but only one point per water change.
<Yes... one thousandth>
I did 2 changes daily to bring it to 1.009 over the 5 days.
<Yes... too much>
Your point that the ich can survive in hypo also differs from other research, but confirms my experience, makes this all the more frustrating. 
<Now... which do you believe? Reality or what's in print?>
I put the rock in following logic: if the tomites die when they leave the cyst and encounter the low salinity water, they can't get to the fish. So the rock makes a good hiding space. Nobody anywhere has been able to contradict my logic other than to use the rhetorical "You can't use live rock or you will contaminate the QT." 
<...>
At this point, I would have to bring the salinity back to at least 1.017 before I could start copper, right?
<Mmm, best to, yes>
The fish would be awfully vulnerable during that period IF the parasite is at least weakened in the 1.009. Though I don't really see the evidence even of that.
<They already are... and weakened by it to boot>
I wonder if I should just stick this out another few weeks and see what happens and if it fails then next time... What do you think?
Thanks.
<Posted, written... in books, articles... Bob Fenner>

Re: PO-ed at QT  11/17/05
Thanks again. I may not have mentioned, my main system is a reef and it is at 1.026. The 1.017 is just where I started my QT. My hesitancy to copper is that some will get into the reef when I transfer the fish. No need to worry on that?
<No worries... very little transferred>
Well, I'll have to figure out how to proceed with these guys but I can't say as I'll be doing this again in the future.  Oh ... your math confuses me. 10/27 - 1.017. 10/28 after 2 water changes 1.015. 10/29 - 1.013. 10/30 - 1.011. 10/31 - 1.009. Each water change lowered by one one-thousandth of a point. 
<Sorry for the confusion... a thousandth per day is about max.>
Anyway, it's all moot now.
<Do hope/trust all will work out. Entrenched protozoan infestations are a/perhaps "the" bane of our industry/hobby... and largely avoidable. Cheers, Bob Fenner> 

Hyposalinity Against Ich...  9/30/05
Hi,
<Hi there! Scott F. at your service!>
I have a question about marine Ich.  I have a 120g FOWLR and have been battling ich on and off for the past year.  I always quarantine my fish for 2 weeks and do a 4-5 min fresh water Methylene blue dip.  Despite this ich has found its way in to my tank.
<Yuck...it does happen>
I have treated the tank 3 times with Seachem's Cupramine copper for 2 and 3 weeks at a time while raising the temp to 82. I also checked the copper levels daily.  The ich will disappear for a few months, only to reappear on my Hippo tang.  My live rock is not so alive anymore.
<Yep...treating in the display tank is not a good idea...>
I am unable to place all my fish in QT because my QT tank is only 30g and I have a Moorish Idol, Hippo tang, Copperbanded Butterfly, Flag fin angel, False Eyed Puffer, Royal Gramma and Neon Goby.  I've been lucky as I have not lost a fish in 5 years.  My question for you is, do you think that hyposalinity will rid the tank of ich?
<Hard to say. Honestly, I don't like this method. However, there are many hobbyists who have used this technique with degrees of success. I never found it to be as reliable as medical intervention (in a separate tank) and running the display tank fallow for a period of a month or more.>
If so,  how long should I lower the salinity for and should I go any lower than 1.012?
<I wouldn't.>
Lastly, over what period of time should I lower the salinity to 1.012 and would doing a 5gal per day freshwater change be too rapid for the 120g tank?
<That's about right...No harm in going slowly. You'll achieve the desired specific gravity soon enough.>
By the way,  I chose Seachem's copper because it is not supposed to be absorbed by your substrate and live rock and it is easily removed by charcoal and copper absorbing resins.  I have found this to be true because after I remove the copper my coralline algae grows back and I am able to keep snails in the tank. In addition, my live rock never gets that blue green staining like you see with other types of copper.
<Good to hear...Nonetheless, I am very much against treating in the display tank. Among other things, it can be more difficult to maintain a proper therapeutic dose in a decorated display tank than it is in a bare "hospital" tank.>
Thanks, Larry
<Good luck, Larry...Just take your time, monitor your fishes carefully, and hang in there! Regards, Scott F.>

Saltwater ick  9/29/05
I have a question about lowering the salt level to wipe out ick, If you do lower the salt level why couldn't you just leave the level low all the time?
<Good question... turns out many stores, some wholesalers do leave their specific gravity unnaturally low for the purpose of reducing troubles with external parasites, increasing carrying capacity by allowing higher dissolved oxygen and saving a bit of money on salt mix (or diluting hauled natural water)... But there are downsides to this practice. Try holding your eyes open in a solution of water that is not isotonic with your body's solute content and you'll see... Aquatic animals are in more or less intimate contact with their watery environments... and leak or not depending on the make up of this world... some more than others. Bob Fenner>

Hyposalinity, Crypt  8/30/05
Dear Bob,
     I have a 180g FO tank that had been stable and disease free for 4-5 years.  The oldest inhabitant is at least 10 yrs old, a purple tang that has done well as I have upgraded my display to larger sizes.  I recently bought a beautiful Emperor Angel, which I quarantined for 5 weeks  ( 55g tank ) in hyposalinity, but not in copper.
<What do you think of hyposalinity now?>
Salinity was initially 1.010 and slowly moved to 1.024 over 2 weeks . Water changes of 20 gallons ( aged mixed Instant Ocean ) were performed on the QT every 3rd day The fish looked great and showed no signs of disease but I kept him in the QT for another 3 weeks anyway.  
     The Angel was introduced into my main display, but unfortunately, my 5 year old Powder Blue came down with crypt about 7 days after introduction of the angel.  I moved the tang  to the QT and treated with Cupramine.  It took about 3 days to bring the copper level to .6 ( which is what Seachem recommends )  
<Yes... this is a chelated compound... the actual free cupric ion concentration is less...>
Additional Cupramine was added to keep level at .6 using the Fastest reagent to test. The level has been confirmed accurate with SeaChem copper test.  The fish has been in this therapeutic copper QT for 13 days   There was no measurable disturbance in nitrification.
<... likely not a therapeutic dose...>
     The powder is still showing signs of disease.  The QT is meticulously maintained with SG= 1.017, twice weekly water changes of 20 gallons, addition of Cupramine as needed.  I have noted that the fish has a few lesions on his head  and the lateral line that are white and appear larger than usual.
<Yes... HLLE brought on by the copper, stress...>
As some heal they leave a small area of depigmentation.  All of the original visible parasites on the fins have been cured.  There are some new smaller white lesions on the gill opercula that look like crypt.  The fish is brightly colored and has clear eyes. The fish is eating, and acting like he usually does. ( He still does like his own reflection )  Are the larger lesions crypt ?
<No>
Any other suggestions ?  
<Too many to list here... What about the infested main tank? The Emperor Angel?>
Do crypt parasites look larger while in the trophont stage and still on the fish because of mucus.
<Yes... you/we're not actually seeing the parasite, but its irritating effects>
Luckily all is going well in the display.  But I am keeping a close eye on things.  
<Your display "has the ich/crypt">
     This scenario has happened before to me in previous systems that have been "closed" to new inhabitants for a long time (years )  It seems that after a long time of disease free survival ( Yes, I do use a UV sterilizer ) in captivity my fish in the main display come down with something whenever I add new additions ( even if I use a QT )  It then seems that I have to rock and roll for a few months to get rid of disease in the main display. Thanks Jimmy  ( Oh, by the way...great book The Cons Marine Aquar )
<Mmm, for the time it will take, I encourage you to re-read over all the Cryptocaryon articles, FAQs files posted on WWM... and refer to the links as you find them... I would at least avail myself of purposeful cleaning organisms in your main tank. Bob Fenner>

Re: Hyposalinity, Crypt  8/30/05
<What do you think of hyposalinity now?>
<<I think that hyposalinity can be used a bridge but not for cure>>
<<Me too>>
<<Doesn't SeaChem recommend that .6 is the target value using their kit ??>>
<<Mmm, yes... do you understand the use of copper formats and chelated, non-chelated test kits?>>
<Too many to list here... What about the infested main tank? The Emperor Angel?>
<<The emperor has no visible signs of disease and is doing great so are the other inhabitants>>
<< I know I need to treat all the inhabitants with copper in a QT but I do not have the space to do so>>
<< It looks like my only other option is to remove calcareous substrates from the display and treat with copper>>
<<Not practically... better perhaps to engage a "balanced" approach of having an infested tank... probable trouble with any new additions' lack of acquired immunity. Bob Fenner>>