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FAQs About Koi Kept in Aquariums
Related Articles: Goldfish, Goldfish
Varieties, Goldfish
Systems,
Goldfish Disease,
Related FAQs: Goldfish 1,
Goldfish Behavior,
Goldfish Compatibility,
Goldfish Selection,
Goldfish Systems,
Goldfish Feeding,
Goldfish Disease, Goldfish
Breeding/Reproduction,
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Butterfly Koi; indoors 11/3/09
Hello I have a 180 gallon aquarium (8ft long) and would like to know if
i could keep butterfly koi?
<Depends what you mean by "keep". Will they live in such a tank? In
theory, yes, given adequate space and very generous filtration (we're
talking at least 8 times the volume of the tank in turnover per hour)
Koi Carp can be kept indoors. However, very few people are able to
provide the conditions they need as indoor fish. I'm a bit confused by
your aquarium being 8 feet long and yet only containing 180 gallons.
Let's say this tank is 8 x 3 x 3 feet, that's 72 cubic feet in total, or
538 gallons. So something's amiss here. A tank 8 by 2 x 2 feet would
only be 32 cubic feet, or a mere 240 gallons, but you can't keep adult
Koi in tanks two feet wide since they get to more than two feet in
length! So you might want to go back, measure your aquarium, and then
ask your question again. A 538 gallon tank would be acceptable for Koi,
being essentially an indoor pond, though you would need massive
filtration. Whenever I've seen Koi kept indoors successfully, by
which I mean they reach full size and live a normal life, they're in an
indoor pond coupled to a pond-grade filter system. Now, I'll also make
the point that on the whole Koi aficionados tend to look down (being
polite here!) on Butterfly Koi. They are not acceptable at Koi shows for
example, and they cannot be graded (which, among other things, means the
quality of Butterfly Koi varies wildly, and as with anything in life,
you often get what you pay for. Butterfly Koi are essentially absent
from the trade in Europe and Japan, and are really only popular in the
US, where tastes are somewhat different ("less snobby" or "less
discerning" depending on your point of view). What I'm saying then is
that Butterfly Koi, like all Koi,
are extremely demanding when kept indoors -- they're pretty demanding
kept outdoors, too! -- and without any sort of quality control, it's all
too easy to end up with fish with congenital defects, poor disease
resistance, and so on (think of puppy mills in terms of dog breeding,
and apply that to breeders cranking out Butterfly Koi). Do your
research, budget carefully for the needs of the fish, and take some time
to locate a reputable breeder of Butterfly Koi who can supply you with
good quality fish. Cheers, Neale.>
(RMF, what do you think of these long-finned fish?) <<As time has gone
by, I've "gotten used to" this variety, and it is indeed included in
some Koi shows here in the U.S. nowadays. However, not "my cup of tea".
BobF>>
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Goldfish has dark red spots and looks like missing scale
(RMF, any wisdom to share here?)
4/15/2009
Hello,
<Hello,>
I work in Afghanistan on a military base.
<Ah, not a part of the world we get many messages from...>
I purchased a small (5.5 gal) desktop tank on the internet.
<OK; but do be careful, these small aquaria really aren't terribly
useful;
do see here:
http://www.wetwebmedia.com/ca/volume_5/volume_5_3/stocking.htm>
My local national employees brought a goldfish for me from a 'pet
store' in Mazar-E-Sharif. I have had many fish in the past and I
would say it is not a true 'comet type' goldfish. It is probably
some type of river fish.
<Perhaps a wild carp of some sort? Or a minnow? A photo would be
both fun and useful!>
I do weekly water changes with bottled water.
<As in drinking water? That should be okay; but don't use deionised
or distilled water, as that will quickly sicken your
fish.><<Actually... the system size, this water... are likely the
sources of trouble here. RMF>>
Recently my fish developed dark red spots (like boils) on the sides
and it appears some scales may be missing.
<Does sound like Finrot or some other type of opportunistic
bacterial infection.><<Environmental in origin. RMF>>
I have no access to any products (other than the internet) so I am
looking for a home remedy.
<Unfortunately there really aren't many reliable remedies for
bacterial infections beyond the use of drugs. The addition of salt,
for example, can help under some circumstances (3-10 gramme per
litre) but it's not
reliable. It's drugs like Nifurpirinol (0.1-1 milligrams per litre)
and Oxytetracycline (20-100 mg/l) that are used most successfully.
Failing that, certain organic dyes and other chemicals can work:
Malachite Green
(0.1-0.5 mg/l), for example. A vet or MD may be able to obtain these
for you. Do note though that since these infections are
opportunistic, caused by otherwise "good" (or at least harmless)
bacteria, if you don't fix the root cause, usually environmental
conditions, the fish won't get better.>
The fish has become more lethargic but seems to be breathing
normally.
Every couple of days I put a small amount of table salt in the
water. Do you have any suggestions?
Thank you,
<Done my best.>
Jon
<Hope this helps, Neale.>
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Re: Goldfish has dark red spots and
looks like missing scale (RMF, any wisdom to share here?)
Hello Neale,
<Jon,>
I appreciate your quick response. I know the small tank can cause problems.
I could not find any dealers online that would ship a larger tank to an APO
address.
<Ah, I see. Unfortunately, science isn't all that flexible! If a fish needs
30 gallons, it needs 30 gallons. I'm mindful of the issues when governments
set fishing quotas as an example. The scientists say the population is only
so big, and the fishermen can tank X fish per year if the population is not
to go into decline. The fishermen say they need twice that number otherwise
they'll lose money and jobs. The politicians, trying to split the difference
and give everyone a compromise, choose some number between X and 2X. Sounds
good on paper, but science doesn't compromise, and the fishery eventually
collapses. In the case of an aquarium, you need a certain amount of water
volume to dilute the ammonia and other wastes produced by a fish (or fishes)
of a certain total mass. With small fish like guppies, this is where the
"inch per gallon" rule comes from: you allow a gallon of water for each inch
of fish kept. Likewise, you need a certain sized filter to break down those
wastes quickly enough that the dilution effect of the water volume remains
within safe levels. To cut a long story short, Goldfish need about 20
gallons when small, but 30 gallons once they're above a couple of inches in
length.>
I do use bottled drinking water (see picture) for the water changes. The
bottle lists the composition / mg in each .5 liter bottle: Calcium-16,
Magnesium-16, Sodium-10, Potassium-<1, Iron-<.01, Bicarbonates-7,
Sulfate-3.5, Chloride-80, Nitrate-<1, Fluoride-<.01, Total Dissolved
Solids-225.
<Should be fine. The pH is important though, Goldfish preferring a pH around
7.5-8.0.>
I have attached a couple pictures of my fish and copied my wife on this
response. She would be able to go to a store in Wisconsin and send me the
products you previously suggested.
<That would be helpful.>
The mail takes about 1 week to arrive.
<Hmm... try adding some salt to the water as mentioned last time, but I fear
this will be a rough week for all concerned. This fish (seemingly a Carp,
Cyprinus carpio, rather than a Goldfish, Carassius auratus) has a bacterial
infection of the type usually called "Ulcer Disease" or else Finrot of some
type. It's essentially an opportunistic infection caused by otherwise
harmless bacteria invading the body of a stressed fish with a weakened
immune system. I really can't stress this strongly enough: the tank isn't
big enough, and the conditions in the water are likely dire. No amount of
treatment will help. Since this is a pond fish (Carp = Koi) perhaps building
a pond is an option? A large plastic drum of some sort perhaps? Otherwise,
to be completely honest, I'd painlessly destroy this fish and stock with
something appropriate to a 5-gallon system. Perhaps some local Killifish? Of
course, wandering off into Afghanistan looking for unusual aquarium fish
might not be all that safe! But would make one heck of a National Geographic
special!
http://www.wetwebmedia.com/euthanasia.htm>
Thanks again for your help and give an extra hug to everyone in your family
for all those of us who are separated from ours.
Thank you,
Jon
Bagram Air Field, Afghanistan
<And good luck to you and all you do out there. Cheers, Neale.> |
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Koi in a reef tank
11/25/08 Hello all,
I live up in MN and have my 3 Koi in a tank in the house for the
winter. It is a bare bottom with nothing in it. I have a lot of fake
and dead coral pieces. I was thinking it might make an interesting
tank to put the coral pieces in the Koi tank. Will this negatively
effect my water parameters and cause an unsuitable environment for
my Koi? I do not want to harm my Koi but want to make their winter
home a little nicer. Thanks Walt <Hello Walt. Fake
coral obviously has zero effect on water chemistry, and should be
just fine in any freshwater tank. As for dead coral (something I'm
sure Bob Fenner will agree is not something we encourage people to
buy, because of the way it is collected) then if you happen to have
a few bits, by all means add to a tank containing hardwater-tolerant
freshwater fish. Koi prefer hard water to soft, so this isn't going
to be a problem from that angle, provided the pH doesn't go much
above 8.0 and the hardness isn't much above 25 degrees dH. However,
coral is "scratchy" and big, clumsy fish (like Koi!) may find
themselves damaged if kept in a relatively small habitat like an
aquarium. It all depends on the size of the tank compared with the
size of the pieces of coral. If it's a 200 gallon tank and the lumps
of coral are the size of your fist, then adult Koi are unlikely to
come to any grief. But in a 55 gallon tank, with corals the
size of your head, then things could be different. Cheers, Neale.>
Re: Koi in a reef tank 11/25/08
Neale- thanks for the response. I agree dead coral is something to avoid but it
was given to me many years ago and I never used it in my FOWLR. <Cool. The
reason I mention things like this is not necessarily for you, but for other
readers browsing our site. In the UK (and indeed the EU generally, I believe)
dead coral cannot be traded at all, and I'd like to encourage people around the
world to generally avoid buying the stuff. Live corals are one thing -- they
have to be collected carefully -- but dead corals are relatively cheap, and
there's little incentive to collect them sustainably.> They are small Koi 2
3" and 1 6". I was only going to use the smoother corals as I am not sure which
are fake and which were real. <Ah, I see. You should be fine. Koi are such
special fish that it is ALWAYS worth taking extra care when housing them,
especially indoors. The benchmark with Koi is high (in my opinion) because it's
decades before they really develop their full potential. They can also be
incredibly expensive, even the "bargain" Koi being relatively pricey fish.>
I am going to add a couple pieces and see how it looks. Thanks again,
Walt <Good luck, Neale.>
Transferring fish... Koi, goldfish...
in a 55? 6/25/08
Hi!
I recently purchased a 55 gallon aquarium (last Sunday)
The Goal is to put 2 Koi and 2 black moors which are housed in a 20 gallon
tank into the new 55 gallon tank. I have put 2 gallons of water from an
established 10 gallon tank.
<Water contains almost no filter bacteria, so adding water from one tank to
another doesn't do ANYTHING to speed up maturation.>
5 gallons from the 20 gallon tank added cycle brand live bacteria as
recommended. I also took the old filter from 20 gallon tank and cut off
pieces of it and threw them into the 55 gallon.
<The good news is that "old" filter media will instantly mature a new
aquarium (if used in sufficient quantity). By contrast, potions like 'Cycle'
tend to be a bit hit-and-miss in efficacy.>
The 55 gallon has been running since Sunday.
<If you have matured the aquarium with filter media, remember: those
bacteria can starve. ALWAYS add sufficient ammonia or fish food to keep them
happy. A couple of pinches of flake work great. As the flake decays, it
produces ammonia, and that feeds the bacteria.>
My question is this...
How long should I wait before adding the fish?
<Don't. Add fish right now. The old filter media will have matured the new
filter, assuming the water chemistry is similar between the systems. You can
take 50% of the media from a mature filter and put into a new filter. The
old filter will carry on working fine, and it will mature any new media put
into it. The new filter with the old media (confusing, I know) is
effectively a mature filter now! This is called "cloning" a filter, because
what you're doing is splitting one mature filter into two mature filters. It
is BY FAR the safest and quickest way to mature an aquarium.>
The pet store told me to get a few tiger barbs to help with cycling but I
don't want any more fish!! lol
<Rubbish advice.>
I am extremely attached to these 4 fish and don't want to harm them in any
way. I am afraid to move them to their new home too soon. Any advice you
could give me would be very appreciated.
<Do an ammonia test. Even with flake adding to the water, you shouldn't
detect any ammonia 24 hours later. This is because the bacteria hitch-hiked
from the old aquarium into the new aquarium on the filter media you moved
into the new filter.>
Oh, also the tank came with a whisper 60 filter (hangs on the tank)
I was thinking to be on the safe side to add another whisper 20 on the other
side?
Thanks
Oh by the way, I didn't add any used gravel because I went with a different
color in the 55
<Do remember fish can't stand brightly coloured gravel. If you want happy
fish, especially goldfish, choose fine gravel or even better smooth silica
(silver) sand. Don't use too much or they'll make a mess, and you won't be
using live plants so a big depth of substrate isn't important. Cheers,
Neale.>
Re: transferring fish – 06/26/08
Thanks for the information. (I feel really stupid now...lol)
When I did the filter I was unaware that I was supposed to take the inside
(charcoal) out of the old filter.
<You don't have to. Old charcoal is simply biological media by another name; it
no longer removes dissolved organics. Carbon only removes organics (the yellow
stuff in the water) for about 2-4 weeks from brand new. Unless you're replacing
it every 2-4 weeks, it isn't doing anything other than supporting biological
filtration. Hence my usual advice to freshwater aquarists to skip the stuff
entirely in favour of high performance biological media such as quality ceramic
noodles or sponges.>
I just cut off the dirty cloth stuff and threw it into the new filter (duh! My
Bad!)
<The sponge in the old filter is precisely what you want; the think cotton cloth
stuff is likely the pre-filter, and of no particular value or harm. It is meant
to replaced every month or two, the idea being it catches solid waste (e.g.,
dead plant fragments) leaving the biological/chemical media free to react with
the water.>
Problem is that now the old filter was thrown away and new one put in the 20
gallon tank on Sunday.
What should I do now?
<Not sure what you're asking. If you've put sponge, ceramic noodles, or even
"old" carbon from the old filter in the new filter, then the new filter will
almost certainly be biologically active. If you have done none of the above, and
only used aquarium water or a bit of gravel from the old tank to "seed" the new
filter with bacteria, you actually haven't done any such thing, and the tank
will need (at least some) cycling. In any event, you ammonia or nitrite test kit
will help here: if you detect either, then you have a filter than needs cycling.
If you have zero ammonia/nitrite, then everything is fine. Test kits beat
theory! Cheers, Neale.>
Bent tail, Koi in tank, using
WWM 4/16/08
I have 2 Koi in a 55 gal. D.A.S. tank.
<Will outgrow this in time>
Water is fine. One of my Koi started to get a little kink in his tail, but
everything was fine (swimming, eating) It has gotten worse. His tail is bent up
(almost in a "V" shape) and now is not eating and is laying on the bottom. Has
been this way for a couple of days now. He is struggling to survive, so I am
trying to help him. Thank you
Charity
<Mmm, well, such bent tails can be a manifestation/expression of genetic
anomaly, nutritionally derived, environmental (too small quarters), or
pathogenic in origin... See here:
http://wetwebmedia.com/WWMAdminSubWebIndex/question_page.htm
put the term "bent tail" in the search tool, read the cached versions
Bob Fenner>
Sick goldfish... and Koi,
env. 2/29/08
Dear Bob
I had a 15cm Koi and comet in a 1 metre tank. Koi suddenly died for no apparent
reason overnight and the comet who was silver started turning pink and the edges
of his back and tail seem to have what looks like bleeding veins as though he is
bleeding internally. I’ve had him for 7 years without any problems. Can you
please help??
Sincerest and heartfelt thanks
Pearl in Australia
<Hello Pearl. The problem with the comet is almost certainly Finrot. The
symptoms here start with congestion in the veins of the fins as the bacteria set
in (that's the pink stuff you see) followed by the tissue dying (goes white) and
then eroding (so the fins look ragged). Finrot itself is almost always caused by
water quality problems. Perform (at the very least) a nitrite test. Check the
filter is working properly, and regardless do two 50% water changes today (a
couple hours apart) to flush out some of the pollutants. Stop feeding the fish.
Being treating with a reliable anti-Finrot medication (remember to remove carbon
if present in the filter). Melafix/Pimafix aren't my recommendation for this,
although often sold as such. Use a decent copper-based medication or antibiotic.
Koi really aren't indoor fish, and certainly can't be kept in a 1 meter tank --
I'm guessing that's about 180-200 litres/40-50 gallons, which is adequate for
Goldfish but not Koi. Koi are simply too sensitive to poor water conditions.
Cheers, Neale.>
My Oranda fish lost it's
eyes -02/20/08
Hi guys,
I searched the site but couldn't find my answer. My Oranda fish is the only
Oranda in a 55 gallon tank along with 3 goldfish and a Koi. Three weeks ago I
noticed one of my Orandas eyes missing and now today another one. I have seen
all the fish at one point or another pick at his fins but, HIS EYES? Why do they
do this and can he survive like this? Will the others continue to pick at him?
So concerned!
Thanks
Concerned new fish mommy!
Have a wonderful day!
Jessica
<Hello Jessica. Eyes are -- after fins -- the bits on a fish easily damaged by
fighting. So the best thing a "concerned fish mom" would do at the first signs
of aggression between fish is to separate them so this couldn't happen. It is
unusual for goldfish and/or Koi to be aggressive towards one another, but they
can be boisterous, and it is ALWAYS recommended that fancy (double-tail)
goldfish are kept in different tanks to single-tail goldfish and Koi. In other
words: Orandas, moors, Ryukin, etc. should all be kept in different to tanks to
plain goldfish, comets, and Shubunkin's. I'm guessing that you didn't do this.
If you didn't, you know now! As for therapy: treat with an
anti-Finrot/anti-fungus medication first, to prevent a secondary infection. Do
also check the water quality, specifically nitrite, to see that there isn't a
problem there. It is entirely possible that minor damage (that could have
healed) quickly turned bad because of poor water quality. There should be zero
ammonia and nitrite in the system. In addition, check water chemistry for the
same reasons. Goldfish need hard (10+ degrees dH) and basic (pH 7.5) water
conditions. Will the eyes grow back? Obviously not. Can he live without them?
Yes, provided he is kept alone. He will navigate using his lateral line and
forage for food by touch and olfaction, but the goldfish with eyes will be able
to out-compete him at feeding time. The result will be a lot like dinner time at
the home of Phineas. Cheers, Neale.>
Some Koi
Flashing but not All 2/1/08
Hello,
<Hi there>
I have a 125 gallon tank with 9 fish in it, 5 Koi, 3 Comet and 1 Fancy
Comet.
<I see them in your pic... a bit crowded physiologically>
Sometimes especially in the evening once the lights go off on the tank,
a couple of the Koi will flash, turning to their sides and making a
swift rub on the bottom. I will also notice sometimes that they flick
their fins rapidly as if something is bothering them, but upon visual
inspection I see nothing.
<Mmm, there may be naught>
I have treated them for parasites with Jungle Labs Parasite tabs, added
some salt to the tank, and I do regular water changes daily, about 20
gallons, during which I grab most of the waste off the bottom of the
tank. The tank has 2 Eheim Profession II 2080 canister filters on the
tank. Further, the fish that do flash do not appear to have any open
wounds or irritated spots. When I have done water quality checks, the
ammonia, nitrate and nitrite levels all appear zero... only the ph seems
a little high at around 7.8. The tank water fluctuates from 67-69F
depending on the
time of day.
<Brrrrrr! You keep your home cool>
So what I cannot figure is, what is the problem? Or am I just paranoid?
<Mmm, perhaps cautious... but unless you have introduced (through
plants, new fish, live food) some new parasite/pathogen, there is likely
nothing disease wise wrong here>
I attached a picture of the setup.
Regards,
Benjamin Schmaus
<I would cut back on these fishes feeding... they're apparently "fat"...
Cheers, Bob Fenner>
Re: Some Koi Flashing but not All 2/8/08
Hello Bob,
<Ben>
So the swollen eyes went back to normal on that one koi and he is also
eating again. However he still flashes now and again I read the
following:
General Hardness influences Calcium levels in the blood, and the
osmotic regulatory systems of fish are affected by concentrations of
dissolved salts. High levels could
irritate gill membranes, they may look slightly swollen, and the fish
may be seen flicking or rubbing in the
water.
<This is so>
My GH is around 180ppm which is rather high. Could this be contributing
to my fishes behavior? Maybe one is a little more sensitive?
<Is possible... though all koi, most all fishes... do flash to a
degree... I do think you and this Nishikigoi are "out of the woods" at
this point. I hope this metaphor means that it will be okay. Cheers,
BobF>
Regards,
Benjamin Schmaus
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Re: Some Koi
Flashing but not All 2/3/08
Hello Bob,
<Good day Ben>
Thanks for the response. So other then a cold basement and fat fish,
there should be no worries on the flashing. Like I said, it happens
fairly rarely.
<I wouldn't be concerned>
You are correct that it is a bit crowded. That will change once spring
arrives and I can place them back outside in their summer home. I
attached a picture of that location as well.
Regards,
Benjamin Schmaus
<Ah, good. BobF>Re: Some
Koi Flashing but not All 2/4/08
Hello Bob,
<Ben>
Here is an update on one of those fishes that was flashing... Today I
noticed that the eyes were bulging more then normal and when I fed them,
the koi would take in food but then spit it back out. There appears to
be no sign of him being bloated or pine-coning. He also exhibits what
one might call a cough.
<Mmm, something apparently amiss>
Water quality appears normal. Although PH might be slightly low, 7.0
side and water hardness is up there. No ammonia, nitrites or nitrates.
The only thing that changed from yesterday to today, was I replaced the
fine filter pad in one of my Eheim's and also changed the charcoal. Both
were rinsed in water before placing.
<Mmm, but only the one fish affected... and only one pad, and no
detected nitrogenous anomaly...>
The other fish seem fine and all are eating.
Regards,
Benjamin Schmaus
<If you had another system/tank up and going, I might move the one not
acting quite right... Perhaps it (literally) swallowed a bug... BobF> |
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Lethargic koi, env. dis.
- 11/26/07
Hi Robert,
<Carson>
I have a small tancho koi that is about 4-5" that I am currently keeping in a
community aquarium due because we haven't built a pond yet. It was purchased at
the same time as a Kohaku koi that is currently 6-7". They were the same size
when purchased. The past couple of days the tancho koi has been very lethargic
and only really moves when you approach the tank.
<Mmm, how long ago was this Nishikigoi purchased? What water conditions was it
under at that time?>
It doesn't seem to want to eat very much. The ammonia level is at .25 ppm,
<Toxic!>
the nitrite is the same,
<Ditto. These MUST be zero>
the pH is at 6.6, the nitrate is at 0.
<You are fortunate here... if these values were higher the NH3... would be NH4OH
much more... and deadly>
The water temperature is at about 74 degrees f. There doesn't seem to be any
spot of ich and none of the other fish are exhibiting any unusual behavior. The
tank is 55 gallon with two filters (one sixty gallon one thirty gallon) that are
constantly going,
The tank consists of the following fish
1 - 4" tancho koi
1 - 6" Kohaku koi
1 - 5" comet goldfish
2 - 2" comet goldfish
3 - 2.5" bala sharks
1 - 3.5" golden shark
1 - 4" tinfoil barb
1 small freshwater crab.
Their diet consists of flakes, freeze dried brine shrimp, freeze dried krill,
and occasionally bottom feeder shrimp pellets.
<I would cease feeding period till the ammonia and nitrite are zip, nada, gone>
Is there anything that I can do to help my tancho koi?
Carson L Maestas
<... you should read... On WWM re water quality, environmental disease... Your
livestock is in grave danger. Bob Fenner>
Carpet surfing Koi
11/28/2007
Hello guys,
Last Saturday morning I found my Koi carpet surfing. I live in MN so he was
inside in an aquarium with a full hood for the winter. He knocked the plastic
lid off the hood. It was still dark so I found him by touching him with my
foot.. Not a great feeling. Anyhow he was still alive so I drained some tank
water into a bucket and placed a power head in the bucket and was able to revive
him. He is back in the tank with the 2 other Koi and 2 goldfish. He is in very
rough shape and lost a lot of scales and body slime.
He is about 12" and was a beautiful bright white with orange saddle. He now
looks orangey white especially on his head and the one side, I would assume that
is the side he was laying on. Anyhow he is breathing the same as the others but
not very active and has yet to eat since the incident. I have been adding stress
coat to the tank in an effort to help. Also, the tank is not heated so the temp
is around 66. Any suggestions to get him to eat? I am feeding them Koi food from
Blackwater Koi Farm ( I am pretty sure that is the name). Should I heat the
tank? Will that help him recover? Any other products to add? I added barley
pellets in the pond would they help in an aquarium? I am running a filter with
carbon right now. I also have saltwater tanks so would adding a little salt be
beneficial to the Koi in the tank?
Any suggestions to get him eat first and then all the way back to health would
be appreciated.
Thanks so much,
Walt
<Hello Walt. Your Koi will get round to eating precisely when he feels like it,
and not a moment before. There's no real advantage to trying to speed this up.
Koi can go weeks without food. So leave him be, and simply offer a variety of
the usual foods you give them. Plant material like pondweed could be placed in
the tank so he can have a bit of a graze if he gets peckish. Heating the tank
won't really provide any advantage unless the tank gets very cold; 66 F should
be perfectly tolerable for a Koi. Adding Stresscoat and salt may have a
marginally positive effect, but for now I'd dose the tank with an
anti-Finrot/Fungus medication just to make sure no secondary infections set in.
This is the most likely problem, because the mucous and skin dried up, and
they're the first line of defense for a fish. Naturally, remove carbon while
treating the fish, and in my opinion, never replace it. Instead add more
biological filter media and ensure you're doing substantial weekly water
changes. Together these will greatly enhance the water quality, limiting the
chances of secondary infections. Once that's done, the fish should make a speedy
recovery. Good luck, Neale.>
Re: Carpet surfing Koi
11/28/07
Neale- Thanks for the quick response. I will pick up a few plants for him.
Also what other fresh foods would you recommend?
<Carp are, at heart, omnivores. Anything soft will appeal. Tinned peas, mashed
prawns, bloodworms and so on will all be good. I find omnivorous fish often
enjoy algae ripped out of a pond. They peck away at it for hours.>
I think Zoecon is for
Marine fish but would adding Garlic Xtreme or Zoecon to the food help?
<Worth a shot. But Koi generally have very good appetites when they're healthy,
and I suspect you'll find he'll take food once he's settled down.>
I will switch to a medicated anti Finrot/fungus treatment and remove the
activated carbon. I have been doing saltwater so long I am blanking out on a
good biological for a freshwater aquarium. Do you have a good suggestion or a
link to do some research? My pond pump equipment is too big for the aquarium.
Would barley pellets help in an aquarium. They seem to really help in the pond.
<This is for fixing algae, right? Not sure they've ever been used in aquaria.
Generally, algae isn't a big deal in aquaria. Yes, you get algae on the glass,
but scraping that off is so easy why bother with anything more complex? Green
water -- that scourge of small ponds -- just doesn't happen in healthy aquaria.
So I wouldn't bother with them.>
Thanks again,
Walt
<Happy to help. Cheers, Neale.>
Re: Carpet surfing Koi
12/5/07
Neale
Thanks for your efforts but He passed away last Friday. My wife called when she
got home to say he was twitching on the bottom. When I got home he was not
moving or breathing. I tried reviving but with no success. The sad part is he
seemed to be getting a little better everyday. He must have been out of the
water long enough to do permanent damage.
Thanks again,
Walt
<Walt, too bad. Sorry things didn't work out this time. Good luck with the rest
of your fish! Cheers, Neale.>
Curios.... ities... Stocking,
not-stocking Koi in fish tanks... some goldfish 11/16/07
I was planning to buy a new aquarium and want to buy some Koi, or any
Chinese type goldfish such as the lionhead. How many can fit into a 55
gallon tank? Fully grown I mean. Thanks for the help.
<The short answer is 0 Koi carp and maybe 4-5 goldfish, depending on their type.
Fancy goldfish tend to be less active than normal, non-fantail goldfish (i.e.,
plain goldfish, Shubunkins and Comets). Koi carp simply cannot and should not be
kept indoors. They never do very well, and their large adult size (around 60 cm)
makes them incredibly demanding in terms of water changes and filtration. If
kept indoors at all, they need tanks measured in the 100s of gallons. Do also
remember that fancy and regular goldfish cannot automatically be mixed. The
really disfigured goldfish such as Celestials and Bubble-eyes have a hard enough
time finding food and avoiding infections. So keep these sorts of fish on their
own. Robust fancy goldfish though, particularly Black Moors, tend to be reliable
tankmates for regular goldfish. Cheers, Neale.>
Please help =] Koi/aquarium
maint. 11/15/07
Hello.
I need some help and the web sometimes confuses me and doesn't really help me
find my answers.
<... You're not alone here. The "Net" is not designed to inform... but more to
"chat", sell stuff... One must search for more informative sites...>
So I was hoping you guys could.
I'm helping my grandpa find a new filter or figure out what's wrong with his
tank.
He has approximately a 40 gallon tank and he has to clean it about every two
days.
He has Koi in there
<Stop! This is "a/the" reason right here... the type of fish (ornamental carp)
and a small volume... They're messy... really need to be in a pond>
so he has to bring in gallon buckets of pond water when he cleans it.
<Oh! You have a pond. This bringing water in is a very good practice>
He says it needs some of the bacteria from the pond in there.
He has 4 Koi in the pond.
Right now he's using a Whisper 20-40 filter.
<A good product>
Is there a different filter he should use or is there something else he should
do?
<Mmm, are the Koi in the tank and not in the pond for a reason? I would add
another outside power filter here... and perhaps a mechanical aerator (bubbler),
but you will still need to change out a good deal of the water weekly. Perhaps a
pump would help here.>
I don't think he should be having to work that hard.
Thank you greatly.
sorry if this is confusing.
<A small submersible pump... one that can be hooked up to a garden hose... and a
shut off valve, ball type like for irrigation... at the end... will help in
moving the water... The outgoing water can/should be gravel-vacuumed, placed on
the lawn... via the same hose. Bob Fenner> |
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