Cyano eaters? Not much of any   11/5/06
Hi,
   I've read that amphipods will eat Cyano bacteria. Do you know  of the best species of amphipod for this task? Or do you know  of a better  animal for the job?
<Mmm, as far as I'm aware, not much BGA is consumed by Amphipods... or any other crustacean group. And no other fish/group... I'd see WWM re other countervailing strategies for controlling BGA>
   I have a red headed neon goby, 1sexy shrimp, 3 Nerite snails,  1 blue legged hermit crab, xenia, half inch sand bed, and 3lbs live rock all in  a six gallon tank.
   Also wondering if there are any species of seahorses that  can be kept in a tank this small.
<Not well, or safely, for long>
Thanks,
Greg
<Bob Fenner>

More Cyano Problems - 10/15/06
Thanks for the help Crew/Eric.
<<A pleasure to assist>>
Over the last few days, my Cyanobacteria issue has gotten a little worse.  I don't really understand what the issue is, so I'm just going to give you a run down on my system and you guys can point out any potential/actual problems.
<<Sure>>
I appreciate the help, as you guys are pretty much the only advisors I have besides books (and I'm a newbie).
<<Happy to help, but best not to limit yourself to a single source of information/opinions...collect information from a variety of resources and then use your own good judgment to make a decision>>
55ga tank, setup end of July of this year.
Orbit Satellite light (two 96watt dual daylight [11hrs] and two 96watt actinic [13hrs] pc's)
1 Maxi-Jet 900 powerhead
1 SEIO M620 powerhead (on while lights are on)
60 lbs live rock
25 lbs lace rock
<<Mmm...this could be the source of your problem.  The origins of this rock vary, some are mostly calcium carbonate (Tufa rock) from lime-rich hot springs, others are mainly comprised of silica from volcanic sources...all "may" contain other (toxic) elements.  Best to stick with rock from true marine sources>>
2 in. sand
1 cleaner "skunk" shrimp
1 coral beauty
1 yellow tang
1 lawnmower blenny
1 diamond (sleeper) goby
1 yellow tail damsel
4ea turbo snails & hermits
Lots of small feather dusters
1 Turbinaria
1 toadstool leather
4 colonies of pulsing xenia (original 1)
1 colt
1 branching hammer
2 small Montipora frags
1 small zoanthid colony
15 gal refugium
1 65watt dual daylight pc (14 hrs)
1st compartment: Remora skimmer
2nd compartment: (9 gal) 3 - 4 inch sand bed, 5 lbs live rock, various macroalgae, 1 mangrove pod (rooting well), 1 conch, dozens of "pods".  All the detritus from the system seems to settle in here.
3rd compartment: bag of activated charcoal
4th compartment: 2 heaters, GenX 1500 pump back to main tank (refugium is next to tank, pumps aprox 8 in up to main tank input)
pH = 8.4, Temp 79F, Ammonia, Nitrite, Nitrate all undetectable, specific gravity 1.022
<<Would bring this last up to NSW levels (1.025/1.026)>>
Feedings are 1 cube "emerald entree"/1 cube frozen brine shrimp on alternating days, and a small piece of Nori on the brine shrimp days.
<<This is too little for the livestock you have...I would at least "double-up" on the feedings>>
Dosing with 3/4-teaspoon "reef builder" 2x/week, 1 ½-teaspoons "advantage calcium" 2x/week
<<Testing for the need of both I hope>>
My only livestock loss has been an unexplained blenny loss in mid-August, an improperly acclimated Linckia, and the zoanthids seem to be declining.
<<Properly acclimated or not, the Linckia had little chance for survival.  These starfish are best left in the ocean>>
I added the SEIO powerhead because I had a few spots of Cyanobacteria in the main tank (in addition to the large amount in the refugium), and I thought the added circulation would help.
<<Indeed>>
The thing is, I am now getting the stuff everywhere.  Red strings of it flowing off many rocks, little mats of it floating at the surface.  Nets of it on some rocks with bubbles underneath.  I think it is clogging flow through my overflow return.  I don't get why; I have good circulation, strong light, low nutrient levels (those I have measured), and macroalgae.  What steps should I take?
<<You don't mention how/if you are treating your make-up/top-off water, as this could be a source of nutrients.  The lace rock could also be a problem, as already mentioned.  If you aren't filtering your source water you may need to consider doing so.  I would also remove the lace rock from the system.  Read through our articles/FAQs re 'Cyanobacteria' and 'blue-green algae' for further info/ideas to help determine and remedy the source.  Keep up with manual removal and be patient...can sometimes take months to get all back in balance>>
Thanks very much, have a great day.
-Mike in NM
<<Good luck with your battle.  Eric in SC>>

Fish Tanks 101... BGA  10/7/06
Ok, I've been in the hobby for 4yrs now and you've shared tonnes of advice for me and I still battle Cyano issues.
<Most all of us do>
I had some existing live rock, about 60lbs and added another 35lbs in May 06.  I was told the liverock was cured,
<Mmmm>
it appeared cured, I had seen the rock tanks that my supplier was keeping... good water flow.  Anyhow, no problems with the rock after a couple of months... but add an upgraded lighting system to metal halides and I now have:
-small leafy green fern looking algae growing
<Neat... Not BGA here>
-small white stems with green tips that are still growing into something interesting I hope
-many many small white tube worms with red flowery heads
-small red finger like growths out of my liverock
** I am happy thus far to have this; however, I also have noticed:
-burgundy/velvety Cyano fuzzy clumps disappeared... dark green bubbly sickly looking Cyano growths
- blackish green mold like looking growths on live rock
- add a complete blanked of beige hair like algae that appears to have small air bubbles trapped in it.
- a few patches of green hair algae
90 gallon salt tank, 20 gallons water in 30gallon sump
4" aragonite sandbed
pH 8.2
No signs of ammonia, nitrites, nitrates, phosphate
Salinity 1.0025
Temp 26.5 - 28oc
CP Fluorescents on 12.5 hours
2x250W Halides on 11 hours
36watts of fluorescent lighting Chaeto in square foot refugium in sump ~ Chaeto seems to be growing.
Aqua-C Remora Pro skimming that needs emptying 4 or 5 times a week.
12gallon water changes 3X month = 30% monthly changes   in 1 week aged premixed water with 24hr aged freshwater top off.  Of note, I am also not getting a phosphate reading from my tapwater.
My water flow is about 15/16 times water volume turnover/hour.
I underfeed my fish.  (Two clowns, a Dottyback, and a yellow watchman goby, starfish, shrimp, crabs)...  I watch as every morsel is consumed and feed 6 times a week alternating flake, frozen mixtures, etc.
I just bought some ROWAphos and a reactor hoping that this will help.  My retailed said that even though I have no signs of phosphate that I likely have a phosphate problem...
and the growth of Cyano/algae is balancing the equation (phosphate high / algae & bacteria high and might get a zero reading).
<Possibly>
  He said I likely would've seen a decent phosphate level reading prior to the growth of all the bacteria/algae.
I have the water flow and am adding a WaveBox to improve overall circulation.  I have great skimming, lighting, water change practices... I am using nutrient export although my Chaeto was only introduced about 3 or 4 weeks ago.  What gives?
<Time going by, succession, removal of available nutrient...>
  One of your other staff mentioned that my tank might be cycling and that the beige algae dust like stuff would disappear with time?
<My overall guess as well>
Although I did move... I kept about 70% of all my tank water.  I shouldn't be cycling after 4yrs should I?
<Happens>
  Or would my tank re-cycle due to the lighting and new liverock additions?
<Of a certainty, this is a likely possibility>
Reading through your FAQ's, any mention of new featherduster worms and green plantlike algae growth and Bob Fenner's comments are that things must be going well for the tank if it is able to support these new life forms.
<Still my opinion>
  Then again, the mention of Cyano bacteria Bob Fenner states that something seriously wrong is going on with the tank.  So, I am confused.
<Mmm, depends on how much, relative BGA, how long it's about... if yours is going...>
Hey wanna fly down to Calgary, Alberta Canada and make my tank look like a show tank?
<Mmm, the convention in geography being what it is, would have to fly up... but, a bit busy. No thank you>
I'm particularly concerned about the dark green/black funny looking patches growing.  Is something rotting all over my rock?
<Likely some>
One last note, I have about 20lbs of liverock that my water falls over from my tank to my sump.
<Mmm... this could be an/the issue... LR should be submersed>
I don't to anything with the rock... the rock and my sump are clean, no bacteria or algae growing (except my Chaeto in the refugium).  Do I have to rinse this liverock used for filtration off or anything ???  Or do I just let it sit.
Help me... help me...
Dave
<Some periodic rinsing (to remove detritus), vacuuming of mulm in the sump is recommended. Bob Fenner, who would immerse the LR, be patient>

Cyano Problem 9/24/06
Hi there,
<Greetings>
My aquarium is 120 g. and it has been running fine for almost 2 years. My two gobies were doing very good and seemed to be a pair.  We added some soft corals two months ago, Kenya tree, polyp stars and a sea mat.  Then, we started adding the Kent Marine Coral Accel because we wanted our corals to grow healthy and fast.  We follow its directions and added the liquid daily. Later, the tank started to create the red slime all over the place.  So we decided just to add the liquid once a week.  The red slime covered all the sand bed.  But the gobies were still digging things from it and were also eating what we threw into the tank.  We just noticed a couple of days ago that the gobies may be little skinnier than before.   
Now, one goby is already dead and the other one is in his home below a rock and is breathing heavily.   
It is because of the red slime that covered the sand bed what caused their death?  If so, how can we get rid of the slime?  I know there is a chemical, but it hurts the corals.  So, is there an animal or invertebrate that can help us out?
Thanks,
Winnie
<Winnie – Unfortunately the red slime sounds like Cyano Bacteria.  There are no critters that consume this and it can sometimes be difficult to get rid of.  Older bulbs and lack of flow sometimes play a key role in feeding it more.  The best thing to do is to check these things and test your water to make sure it is ok.  Siphon out as much as you can.  I agree, the treatment should be a last resort, but does help a lot.  Cheers! – Dr. J>

Snot Algae & Bleaching Mushrooms. SW system out of whack, driven further   9/20/06
Hi Crew,
<Richard>
I have a 75 g. reef that I just tore completely apart and put back together again, due to a monstrous invasion of brown slime, or "snot" algae. Brown filamentous stuff (Cyano, I'm told)
<Very likely so>
that also produces lots of air bubbles within it. The tank had turned into one big swamp. I tried everything and couldn't get rid of it, and it had finally killed off all my corals, save a few hardy mushrooms of various kinds, which had shriveled up, but were somehow still breathing; and my 4 fish: a Maroon clown, Hippo Tang, Cleaner Wrasse, and a Neon Dottyback.
I rinsed the crushed coral and scrubbed off all the rocks (in salt water, old mixed w/new). I added 2 more powerheads (4 in all now, 2 Maxi-Jet 1200's and 2 Aquaclear 50's), replaced all the lights (6x40w: 3 URI actinic whites, 3 actinic blues), replaced the lamp in my (25w) UV sterilizer, cleaned the bio-tower and protein skimmer (Kent Nautilus), put new impellers into the 2 Mag Drive 7's (one for the return, one for the skimmer), and reinstalled the plenum (4" of aragonite on top of it, with screens halfway down to prevent burrowing creatures from breaking into the plenum). I have the 2 Mag Drives plumbed externally, trying to keep the water temp down (still tends to run about 81 or so from all these heat sources). I used half/half old and new (Tropic Marin salt in distilled) water. I live in the mt.s, and my well water's alkalinity is just off the charts, about 30 dKH. Even the RO unit I put in doesn't do any good). pH 8.3, Alkalinity 13 dKH (not sure why it's so high), NH3, NO2, NO3, PO4 all zero. Calcium is very, very low right now, about 180.
(I'd just stopped trying to fight the stuff, and had given up regular maintenance for quite some time).
All started off well enough on restart, trying to keep everything very clean and in order, but within a few days the snot algae started to return: little air bubbles all over the rocks, etc. So, I went to plan B, and decided to treat the tank with Erythromycin (fresh water Maracyn),
<Am sure you've seen my/our opinions on such... short term non-solution>
(1) - 200 mg tab each day for 4 days, (air to protein skimmer cut off, and UV sterilizer unplugged). At first, I thought it was working, but after the 4 days, the Cyano all returned again,
<Bingo>
nonetheless. One day later, on advice from pet store, I did a 2nd round of ER, this time double-dosing with (2) - 200 mg tabs per day, & this time for 5 days. Every day I would get in with a toothbrush and turkey baster and scrub all of the little air bubbles and slimy brown stuff that had developed off of the rocks, substrate, glass, etc. Yet every new day saw new growth of the stuff. It's just invulnerable, tenacious as hell. Right now I'm running an old Magnum canister filter for a few days, while stirring up anything that's accumulated on the rocks and substrate over the last 2 weeks, just trying to keep things as clean as possible. So this is problem #1. How on earth do you kill this stuff, short of using bleach on everything: rocks, corals, substrate, fish & invertebrates included?!
<Please read here: http://www.wetwebmedia.com/bluegralgae.htm
and the linked files above...>
2nd problem: After re-establishing the tank,
<It's not>
I went out and bought a few easy corals, just to have something to make it look more like a real reef tank again. I bought some blue mushrooms, some (I think they're) Ricordea mushrooms, and some green star polyps. I also put in 40 new astrea snails, (as there is still a lot of green hair algae on the rocks, which had grown somehow underneath the snot algae), 40 tiny blue hermits, 2 scarlet hermits, and a couple of unknown hermits (?? I had one like them before, with salmon-coloured legs and dead-blue eyes.
Cute, and very peaceable. A real workhorse at his job). I also added 2 new fish, (a Powder Blue Tang and a Tennenti Tang),
<No...>
and a 2" Linckia
<... no...>
starfish (brown in color, not sure what variety he is). All seemed well enough at first, the Cyano problem aside. After about a week, I woke up one morning and the Ricordea mushrooms had started to bleach (by now almost completely bleached, and drawn up). It happened overnight. There were 2 things different that I'd done the day before. I'd added a healthy (but not extreme) dose of Kent Essential Elements,
<Of no use here>
and added a dose of Seachem Reef Advantage Calcium (1 1/2 tsp of the dry crystals, mixed in distilled water). I did this on top of having already put in  1 tbsp each of  parts A & B, Kent  Tech CB Calcium Buffer liquids, (which I'd already been putting in each day before that, as well),
<Such supplements should only be introduced with new water during change-outs... pre-mixed and stored ahead of time>
trying to get the calcium level up a bit. 2 questions here: I'm sure that one of these must have stressed out the Ricordeas, and that they've lost their zooxanthellae. Which one of the additives would you suspect as the culprit, if either?
<Does it matter? Both, mis-applied>
I had the Ricordea high in the tank, but it had been doing great there for a week, until this happened overnight. The blue mushrooms are still doing great, as are the assorted little green and brown varieties that are making their comeback from the swamp era. The final question is, will the mushrooms ever get their zooxanthellae back, or are they just doomed? They look really bad at the moment, bleached almost completely white. Anything that can be done to save the poor things?
Thanx for the help,
RickG
<Rick... you need to "get" your system to "center"... under regular control... I suggest you consider adding a refugium, incorporating a DSB and macroalgae... with a RDP light arrangement... this is the simplest, easiest, most straight-forward "thing" you can do to salvage this system. Bob Fenner>

Red Turf Algae  - 09/14/06
I have what I believe is red turf algae growing like mad in my refugium.  Originally I thought it might be BGA/Cyano.   However, under a microscope I can see clearly defined nuclei.  
   <Ahh!>
  To date, it has not shown up in my main display, however I am concerned it will eventually migrate. Any suggestions?
   <Keep the faith... not likely to "move" if conditions don't allow/favor it in your main display... and you can likely "re-center" the fuge to disfavor it there>
  To follow are my current system parameters that I test for:
  Nitrate: 0ppm
  Nitrite: 0ppm
  Ammonia: 0ppm
  Phosphate: ~.5ppm
  pH: 8.26
  Temp: 80F
   <Looks good. Bob Fenner>

Fire Shrimp Problem... new water? Cyanobacteria? Cat flea med.?   9/5/06
Hi Crew,
<Tom>
My Fire Shrimp has been having problems when I change water.
<Very common>
  He first appears to excitedly dash around the tank (very uncharacteristic) and then he will fall over and twitch.  I've seen this three or four times over the last couple of months - but not every time I change water. In the past, he has recovered after a day.  The two Gobies in the tank have never shown any sign of distress.
<Need... to read... re the necessity of pre-mixing, storing, matching new and existing water quality...>
Just over a week ago, I saw this again, and noticed that it occurred before new water went into the tank.  When it occurred, I was working on scrubbing what I believe to be Cyanobacteria off the rocks in preparation for siphoning it out.  I immediately stopped what I was doing and put new charcoal and a Polyfilter in the power filter.
<Mmm, maybe an interaction here...>
At this point, I remembered something about possible toxicity of Cyanobacteria.  Your site mentions possible toxicity, but provides no details of how toxic or what creatures are affected.
<A huge topic... all affected to degrees>
Later, my son mentioned the extreme toxicity of flea treatments for household pets.
<Mmm, some... not all... to aquatic life. Can be investigated via the Net>
I did some research and learned that the product we use on our cats (Frontline) has an active ingredient that is extremely toxic to shrimp (1 ppb kills some species) and furthermore that this poison gets onto a person's hands by handling a treated cat anytime within a month of treatment.
<Yes, this is so>
I had not been all that careful about washing before working in the tank (and I really find dedicated gloves just too hard to use).  So I became pretty convinced that flea poison on my hands was the source of my Fire Shrimp's difficulties.
<I see>
I resolved to be more careful about cleaning my hands and arms in the future before working in the tank.
<Good>
A couple days ago, I did another water change just after a shower and with no intervening contact with cats.  Everything seemed to go OK, though I did not make much effort to clean off the Cyanobacteria.  My Fire Shrimp did not seem bothered (though he has not fully recovered from the previous severe episode, and I don't think it likely at this point that he will).  I also re-introduced three Peppermint Shrimp at this time, and they had no problems.  (These had been removed on suspicion that they were eating my Xenia, but I later discovered a hitchhiker crab doing this, and so I am assuming the Shrimp are innocent.)
<Mmmm>
Today, I washed my hands with soap and rinsed my arms before spending half an hour using a toothbrush to clean off Cyanobacteria.  I tried to get the Cyanobacteria into a separate small container to be disposed off, as I was not planning to siphon the tank.
After a half hour or so, I again noticed my Fire Shrimp looked disturbed, though not in truly extreme distress.  I immediately stopped what I was doing and began to compose this email.  Also notable is that the Peppermint Shrimp showed no signs of distress.
So here's the puzzle.  Is the flea medicine to blame, and I really must shower or use gloves before working on the tank?
<Doubtful... or all shrimp would be similarly mal-affected>
Or is the toxicity of the Cyanobacteria to blame (or also to blame)?
<Maybe>
And, should we assume that the Fire Shrimp in its current damaged state is simply more sensitive to toxins, or perhaps by nature more sensitive to toxins?
<I still am mostly placing the credit/blame on the new water...>
By the way, I am also working on fixing the causes of the Cyanobacteria, which got out of control while we were away on vacation for a couple weeks this summer.  I'm running Polyfilter, changing 10% of the water weekly, and I've reduced the light (from 192 watts of 50/50 to 96 watts of 50/50 over a 30 gallon) in the hopes that the other algae will better compete for nutrients.
<A good plan>
Other algae present include Coralline, Halimeda, and an unidentified algae that is turf-like, attractive maroon under lower light conditions and faded yellow-green under high light conditions (hope this one isn't toxic too).
Thanks,
Tom
<Please read here: http://www.wetwebmedia.com/shrimpsysfaqs.htm
and here: http://www.wetwebmedia.com/water4maruse.htm
and the linked files above. Bob Fenner>

Re: Fire Shrimp Problem  9/6/06
Thanks Bob.
<Welcome Tom>
Below is some follow-up.  Reading is optional, and a reply is not required (though always of interest and appreciated):
I have been following your advice about pre-mixing and aging my new water.
<I see>
I mix it to specific gravity of 1.024-1.025.  I rarely check my tanks, but I just checked the one in question and found it to have specific gravity right in the middle of that range.  I use B-Ionic for alkalinity and calcium.
<Good product/s>
Also, I've had this Fire Shrimp for 11 months and noticed no problems until the last few months.  One thing that changed was that we got a new kitten in June, and for a variety of reasons, he gets handled a lot more than does our older cat.
<Mmm...>
Finally, on at least one occasion it was clear that the Fire Shrimp's distress began before new water was added.
So, I find it hard to believe that the new water is the problem.
<I concur>
Instead, your comments lead me to think that the flea medicine and Cyanobacteria might both have played a role here.
<Yes, either/both could>
And I guess I have to assume that the weakened state of the Fire Shrimp accounts for his reaction last time, when the Peppermint Shrimp were not noticeably affected.
My take-home message: take care to have clean hands and get rid of the Cyanobacteria (as carefully as possible).
Thanks again.
Tom
<Well summarized. Thank you. BobF>

New Tank Cyano 9/2/06
Gang,
<Hi>
I've waded through the voluminous info on Cyano outbreaks, and while I think I understand, wanted to check to make sure I'm not missing anything. <ok>
Here's my setup:
58-gal Oceanic show tank, 2 months old, 85lbs Marshall Island LR, RO/DI water, Tropic Marin salt.
Amiracle MR-200 wet/dry, bioballs, <Clean it often> Quiet One 3000 return pump
AquaC Urchin Pro in-sump skimmer, Mag3 pump
Digital Aquatics ReefKeeper 2 controller with Pinpoint pH probe
Current USA SunPod light, 2x14k 150watt HQI Halides and white and blue LED moonlights.
Occupants are 4 tiny Ocellaris Clowns, a small Potter's Angel and a Lawnmower Blenny, various snails and hermits.
<4 clowns may be a problem later on>
Parameters:
Ammo and Nitrite 0
Nitrate 10
Phosphate 0
CA 440
dKH 11
pH between 7.95 and 8.1
<Good, pH a little low, but not horrible, closer to 8.3 would be better.>
I'm doing about 40% water changes weekly at this point, but the Cyano is covering everything at a rapid rate.  Other steps I am taking:
1. Reduce photo period to 9 hours from 14
2. Boyd's ChemiSheet (supposed to be like ChemiClean, and remove organic phosphate) - in sump - will run for 48 hours per instruction.
3. after the ChemiSheet, hook up a Fluval 304 temporarily running Boyd ChemiPure and RowaPhos.
4. lowering collection cup on skimmer to collect more but wetter skimmate.
5. Feed only once a day. - Scrape and suction Cyano as much as possible daily.
6. continue 25-40% water changes based on Nitrate readings.
Is there anything else I should be doing?
Thanks,
Dave
<Sounds like you are on the right track, just takes some time.  Might want to try some PolyFilters as well, they are good at removing phosphate too.  Also, try feeding every other day for a while to see if that helps.  Other than that just need time to allow the tank to cycle through this.>
<Chris>

New Tank Cyano Part II 9/2/06
Chris,
<Hi again>
Thanks. <Sure>  These are tank-raised Ocellaris from the same hatch, so I am optimistic they will remain non-aggressive.  Time will tell, of course, and I am prepared to move 2 of them if required. <Good>
I've had a problem since day 1 with the pH in this tank.  I can get it to 8.3 using lots of Seachem Reef Buffer, but I start to plate out calcium on the glass if I use that daily.  I would think that at 440 CA and 11dKH pH would be higher, but it just isn't.  Sort of at wit's end on this one.
<Are you buffering your water change water?  Otherwise maybe increase circulation, a build-up of CO2 can cause pH problems.>
I am not familiar with Poly Filters - can you tell me who makes them?
<They are made by Poly-Bio-Marine, found on most online supply stores.>
Thanks,
Dave
<Chris>

New Tank Cyano Part III 9/2/06
Chris,
<Hi>
Thanks again. <Sure> The ChemiSheet is starting to do it's job, much less Cyano than even 24 hours ago. <Good> A lot of it seems to be attached to hair algae from that phase of tank startup, so as the hair algae dies, the Cyano removes rather easily. <Make sure you remove as much as possible, otherwise it will decay and release PO4 back into the system.>  I see some good patches of pink/purple coralline starting, and the first few bubbles of Valonia (which my Blenny LOVES), so I guess higher-order stuff is starting to make it's appearance. <Also good> On a whim, before I got your reply, I redirected my return pipes down onto some of the rock work to try and help dislodge the Cyano, which seems to work well.  And guess what?  With no added buffer, my pH is up to 8.2 tonight at lights off. So seems like a CO2 pool somewhere for sure. <Yep> I do buffer my water change water both for CA and Alk and pH and temp match, in addition to salinity.
Dave
<Sounds like you are on the right track.  Good luck.>
<Chris>

Cyano, Hair, and Temperature   8/31/06
Good morning...
<Getting to be...>
Just wanted to get your opinion on my battle against Cyano.  I tell ya, except for learning the hard way once... not to add 4 fish into a new tank at the same time years ago, my tank has been running pretty smoothly.  My only problem is the fight against Cyano bacteria.
<A common pest>
I have a 90 gallon salt tank with a deep sandbed 3 - 5".  I have a 33 gallon sump that operates about half full.  I am getting really good skimming out of my AquaC Remora Pro (I have to empty and clean 3 times a week, sometimes more).  My water volume turnover per hour is approximately 17 times.
pH 8.2
Ammonia: n/a
Nitrite: n/a
Nitrates: on my test kit, I'm either showing no signs or very minimal.
Tough to tell between two shades of yellow on a piece of paper.
Salinity 1.025 (am I missing a zero in there?)
<Nope this spg is about right>
I have just recently added a new lighting system, two 250watt metal halides, two 96watt compact fluorescents.  I have only been using one of the halide lamps in order to get a handle on my aquarium room temperature as well as my tank temperatures... in addition to let my critters get use to the new lights.  I don't have any corals yet.
I am lightly feeding flake food maybe 3 times a week, and then using either krill, bloodworm, or Mysis shrimp, twice a week.  Fish are only fed 5 of 7 days.  Since I've been battling the Cyano bacteria for about a year... I had upgraded my protein skimmer (mentioned above) and my water flow.  As well, I am watching that I am feeding only as much as the fish are consuming.  With my light feeds, I don't notice much going to waste.  At times, I don't think my yellow watchman goby is getting any... but he's quite large and is staying fairly plump and healthy looking.  One of my friends with a fresh water tank is shocked that I feed them so little.
<Likely getting quite a bit of nutrition/small animal life from the substrate infauna production>
  In short, I don't think overfeeding is my Cyano issue.
<Doesn't read like it... just a dearth of competitors thus far>
I have a refugium being setup in my sump.
<Oh! Good>
  It's about a one foot square section with 1" deep Miracle Mud and I am waiting for a cluster of Chaeto' something-or-other.
<Chaetomorpha...>
You guys recommended it to me and I'm sure you know what I am referring to.  I figure this will help a little in biological filtration and competing for nutrients.
<Oh yes>
My water changes...   I am doing partial water changes about two to three times a month (5 gallons each time).  After reading Bob's wonderful book... I'm thinking, that this HAS TO BE my solution?
<Is of help>
With approximately 115 gallons in circulation... I should be changing out approximately 30 gallons a month, correct?
<Mmmm, or more... more frequently... see WWM re... 10-20% every two weeks or so...>
As well, I have been taking straight tap water at about 22 - 25oc, mixing my salt until it appears to be fully dissolved... adding a minute amount of additive that removes chlorine/chloramine/ammonia, and then adding direct to my tank within about 5 minutes.
<Mmm... Please read here: http://www.wetwebmedia.com/water4maruse.htm>
As well, I have been topping off evaporation straight outta my tap without waiting.
<I'd invest in an R.O. device...>
  In your opinion, would you say that this would be a likely cause of a continuing Cyano problem?
<Mainly a lack of competitors...>
With all the other upgrades I've made: water flow, skimming, lighting, working refugium soon!!...    If increase my water changes to 10gallons 3 times a month from water that has been premixed an aged for a minimum 24hrs... if not 3-7 days    and if I keep aged fresh water available for top up, should this remedy my Cyano issue?
<I give you very good odds>
If so, will the Cyano just die off over a month or so?  Or, do I need to syphon what I see off first?
<Will go a bit at a time... over a month or more likely... can siphon during water changes>
On a side note, I have some pretty long green hair algae growing all over.  Ya, it looks kinda nasty, but this actually beneficial to my tank, correct?
<Mmm... marginally>
I will be getting a tang soon... Can I safely presume that I shouldn't have to worry about adding 'greenery' to my tank for food as long as I have the hair algae with my tang?
<Mmmm... not really. Many such "greens" are unpalatable... and/or of little food value>
I was reading in a book that with all the chemicals in municipal water systems... that basic tap water is a sure cause of both massive Cyano and hair algae outbreaks and that a reverse osmosis mechanism is absolutely necessary.
<Not always necessary... but often desirable... I/we use such for our drinking and cooking uses... but I skip for my African Cichlids... they get "hose water"... and a bucket of hot straight tap during the winter...>
Yet, Bob mentions simply aging the tap water.  Will aging tapwater really minimize nutrients and 'food' in the water??
<Yes... a good deal of the municipal additions and "picked up" soluble material precipitates, insolubilizes with time>
Lastly, my aquarium room sits at approximately 23 - 25oc.  My tank seems to have a low of 26oc after the single metal halide has been off for a few hours, but rises over several hours to about 28 or 29oc with the single lamp on.
<Mmm... this is too much of a thermal swing...>
I'm fearful that if I use two lamps... my temperature will rise twice as fast and will peak at maybe 31oc?
<Not good>
The fans are working on my CoraLife lighting unit.  Is this daily temperature change going to be an issue for keeping corals?
<Likely yes...>
  Should I wall mount a fan to cool the air in-between my lights and my tank?
<Can try... but you may be a customer for a chiller>
We get cold winters, so I'm thinking 8 months out of the year this won't be an issue, but during the summer it's tough to keep the tank cool.
<Maybe>
You guys are always a tremendous help... don't know what I'd do without ya!
<Glad to share. Bob Fenner>

Re: Cyano, Hair, and Temperature  - 09/01/06
Thanks for the response.
<Welcome>
One other question.  I realize and am not looking at this as a solution... But... I am getting into some beginner corals.  Corals will feed off of dissolved nutrients, correct?
<Mmm, some species to an extent... others are more/less to non-photosynthetic... many are filter feeders to carnivores...>
  Will this aide in out-competing for the nutrients to which the Cyano is thriving on?
<Yes>
Will adding one or two corals be a bad idea if I am having Cyano troubles?
<Might>
I am still proceeding with my refugium.  As well, I think I will go ahead and purchase a reverse osmosis unit.  Have you heard anything good or bad about the Aqua FX Barracuda 4 stage  or the Kent Marine Maxxima RO/DI unit?
<Please see WWM re...>
Would one still have to age water that has been processed through the RO unit?
<Better to do so... particularly if adding material/s to it as well... BobF>

08/25/2006 - Tank Cycling Problems
Hi WWM crew!
<Hi there EricS here>
I have been reviewing the information on your Web site which has helped me figure out what I have done wrong clearing out a Cyanobacteria invasion and what I needed to do right, but now I am stuck as to where I should go next!  So I am hoping to get some one on one guidance.
<Great start. Always refer to the web site first! Thanks much!>
Here is the history - about a year ago, we set up a 30 gallon salt water tank which we enjoyed for about 6 months with no problems.  We decided to upgrade to a 55 gallon tank and for a couple of months had absolutely no problems.  The tank was set up with a Skilter Filter with a protein skimmer (that we weren't using at the time) and a wheel power filter.
<My opinion on the Skilter is not a very efficient product for that size of tank they may work merely OK for a small tank.  But not for a 55.  Please look at the AquaC Remora or CPR Backpack for a hang on skimmer.  The BioWheel is merely optional when you have live rock>
About 2 months into the 55 gallon tank, we began to lose fish - including a clownfish, a royal Gramma, a yellow tang, and a couple of cardinal fish (the first one and then one we got to replace).  These fish died at the rate of about 1 a day.  We had water tested which came back with normal results and the fish store said that we might have introduced an infection that affected our fish, but not our invertebrates (we had a couple of peppermint shrimp, a cleaner shrimp, a brittle star fish, and a variety of snails and hermit crabs).  
<What did they exactly test for? What test kits?  Do get your own so that you can do these tests on a regular basis yourself>
So we tried again with some blue/green chromis (started with 5) that began to die after a couple of days in the tank at the rate of one a day until we were down to just one.  After that one had survived for about a month, we decided to add some more fish and added a royal Gramma, a tomato clownfish, and a yellow and black fish that I can't remember the name.
Around that same time we started to get this invasion of a red algae looking film that after some research I decided was Cyanobacteria.  The fish store suggested we add power heads to our tank and start using the protein skimmer.  We started the protein skimmer and added to 212 Powersweep powerheads.  
<More current is definitely a good suggestion.  Try to point the powerheads more toward the areas that have the Cyano.  I think you still need more current as this is a 4 foot tank.  I have a 75 gallon with 5 powerheads in it and a return so quite a bit of flow :)  You do not need that much but do add more and point them as directed to help clear the Cyano.  Do not use any medications. >
We really saw no difference in the tank accept that the fish appeared to enjoy the current!!!  Our red slime invasion continued to get worse!  Then death hit once again and we lost our royal Gramma, the blue/green chromis, and the tomato clownfish.  I took more water to the fish store to get tested along with the a sample of the red slime.  The water tested fine and they agreed that the red slime is Cyanobacteria.  One thing I had learned was that we weren't doing correctly is our water changes - we have not been vacuuming the gravel at all, just collecting water off the top - so I think that the "junk" we built up in the gravel may have caused many of our problems.  So, the fish store sold me a gravel vacuum and some "medicine" for the Cyanobacteria. <Again no medicine.  I believe in natural methods.  Need to find the main culprit.  Cycling and lack of flow are most obvious.  A minimum of a nitrate, nitrite, and ammonia kit.  I like Salifert.  These kits will allow you to watch the cycle.>
I have now learned that the "medicine" is more like "poison" as within 12 hours of putting it in the tank, we lost our yellow and black fish and our cleaner shrimp.  We are down to one peppermint shrimp, a brittle star fish, and two hermit crabs.
So, what we have done now is a 20% water change using the gravel vacuum, thoroughly cleaned all components of the tank, and changed all the filter media.  I also created a "sea storm" prior to vacuuming by shaking every piece of live rock prior to removal so I could clean under each piece.  I must say, the tank looks beautiful this morning!!!!
My questions to you are what do we do next?  My thoughts were that we may need to let the tank cycle again.  Will it be possible to add fish in the next couple of weeks if the water tests O.K.?  If so, what fish do you suggest we start out with this time?  Do we need to go back to the damsel fish for a while or can we start with some others?  Also, in the mean time, do we feed the brittle star fish at all or can she find enough to eat in the tank?  Our plan is to continue water changes on a regular basis as we did in the past, only using the gravel vacuum from here on out.
<What are you using for substrate?  Your next steps are to purchase your own test kits so you know that the reagents are fresh and the test is of good quality.  How good is the water that you are using to mix with salt? What do you use to test your salinity levels?  Next fish could be the chromis again.  They are pretty hardy fish so do a couple more water changes.  Get your tests done by yourself.  And then try the chromis I think you will find better success with the flow pointed correctly to rid your self of the Cyano problem.>
Thank you in advance for the assistance with these problems.  We enjoy our tank very much and don't want to give up!
<Don't ever give up!!  You will continue to learn all the time.  Buy some good books to start with and always try to read online as much as you can.
Good Luck! EricS>
Kind regards
Leslie

Bubble/Cyano Issues - 08/22/06
Greetings from Grayslake, IL
<<Back at you from Columbia, SC>>
I've read a lot (I won't say all) of the FAQs regarding bubbles but I am still running across an issue.
<<Ok>>
Here is my set up:
- 29 gallon reef tank up and running for about 8 months now
- CPR Bak Pak
- Magnum 350 Canister Filter
- 2x96 Watt 10k PC (On for 7 hours)
- 2 actinic bulbs PC (On for 10 hours)
- 40(+-) lb live rock
- 2-inch live sand
- RO/DI 4-stage system
Here is my problem.  I still get bursts of air bubbles from the canister filter.
<<Hmm, air intrusion from somewhere...builds up to the point where the bubble is large enough to "escape" to the outflow/impeller chamber of the filter pump...thus the "bursts" of bubbles>>
I have broken down the system and have replaced the o-rings and have added metal clamps on the all of the hoses to try to tighten it all down.  Can't really find any leaks in the system.
<<Have you tried "sealing" all the joints one-at-a-time with Vaseline?
<Mmm, would not use a Petroleum-based material... too likely to act as a solvent... soften the tubing in the long/er run. Perhaps a Silicone-based lube. RMF>
  Have you checked to see if bubbles are being generated/pulled in to the filter through the intake from the intake water chamber (sump?)?>>
In addition to the bursts of air bubbles, when the lights are on I get a small amount of bubbles constantly.
<<Check the placement of the filter intake/the possibility of bubbles in the surrounding water being pulled in to the filter>>
Suggestions?  Replace it?
<<Might be worth a try>>
What would you guys/gals recommend for a replacement?
<<I've always had good luck with the Fluval line of canister filters...and if you have the bucks, Eheim is a good choice>>
I am also getting some muck on the top of the sand when the lights are on but it is gone when the lights are off?
<<Cyanobacteria...possibly>>
Some of my live rock has turned red on the tips, don't think that it is coralline algae.  Some form of algae was wondering if I need to be concerned here or not.
<<Hard to say...likely not.  But do have a look through our FAQs/articles re "Cyanobacteria" and "blue-green algae">>
Thank you for your time.
<<A pleasure to assist>>
Like everybody else...Love the site!  Very very informative.
<<Always good to hear...thank you>>
Sincerely,
Richard Hunt
<<Regards, Eric Russell>>

Re: Bubble/Cyano Issues   8/22/06
Thanks for the reply.
<<Welcome>>
I am not running a sump, just the CPR Bak-Pak and the Magnum Filter.  Regarding the Vaseline...how is that done?  Do I pull out the connections and add it to the connection or to the hose?
<<No need to pull apart the connections...just smear some around the "above water" connections to seal them temporarily.  Do this one at a time watching each for a bit to see if the bubbles stop>>
The intake is behind a piece of live rock, so I don't really have any air coming from there I don't believe.
<<The steady stream of air bubbles while the lights are on could be nitrogen bubbles from your rock/substrate being sucked in to the filter intake>>
Again, Thank you
Richard Hunt
<<Regards, Eric Russell>>

Re: Bubble/Cyano Issues - 08/22/06
Now that’s interesting.  I do have tiny bubbles all over the red stuff on the rocks that I spoke about in my original post.  Could that be what is getting into the filter?
<<Ah, most assuredly Cyanobacteria then...and yes, the filter intake could be pulling-in these bubbles>>
If so...how do I get rid of the bubbles from the live rock?
<<Increased water movement often helps when battling this blue-green algae.  Do have a read here and among the links in blue for much more information:  http://www.wetwebmedia.com/bluegralgae.htm >>
Thanks,
Richard
<<Quite welcome, EricR>>

Cyano/Control  - 08/11/05
Hello WWM Crew !
<Hello Steven>
I'm sure you're getting ready for your weekend and I appreciate any time you can give on my question!
<"Your weekend".  Thanks for the laugh.>
I have a 250 gallon reef tank with corals, fish and live Marshall rock (250lbs to be exact).  About a month ago I setup a 90 gallon refugium with a 4 inch sand bed, a pound of chameto, <Chaeto> a pound of Caulerpa mexicana, two halogen lights from Home Depot with 600 total watts, and it is on a reverse lighting schedule from my main tank.  However, the refugium, is next to a window that gets direct sunlight for a few hours a day, and indirect sunlight for the rest.  As of the last few days I have had a breakout of Cyano in ONLY my refugium.  There is a slimy top layer to the top of the sand and parts are slowly creeping onto my macro's.  My question is, why is only my refugium having Cyano and how do I get rid of it?
<Mmm, could be excessive nutrients in the sand and not enough flow across the sand.  What is the color temperature of the halogens? Read here and links above for more info.
http://www.wetwebmedia.com/bluegralgae.htm>
Thanks so much!
<You're welcome.  Mmm, everyone's shift key must not be functioning today.  In the future, please cap letters where required and do a spelling/grammar check.  Thanks, James (Salty Dog)>
-Steven