FAQs on Characoids/Tetras & Relatives Social Disease
FAQs on Characoid Disease:
Characoid Disease 1,
Characoid Disease 2,
Characoid Disease 3,
FAQs on Characoid Disease by Category:
Diagnosis,
Environmental,
Nutritional,
Infectious,
Parasitic,
Treatments
Related Articles:
Characoids/Tetras &
Relatives,
Related FAQs:
Characoids/Tetras & Relatives,
Characoid Identification,
Characoid Behavior,
Characoid Compatibility,
Characoid Selection,
Characoid Systems,
Characoid Feeding,
Characoid Reproduction,
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Most Characoids are schooling species... NEED to be kept
in a group... in small volumes, odd numbers of individuals are best.
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Minor Serpae Tetra fin rot? 11/2/14
Greetings. I have a 55-gallon aquarium that we set up 2 years ago & has
been stable and disease-free. Water parameters are: ammonia = 0, nitrite
= 0, nitrate = 30, phosphorous = 0. I do a water change every week. We
have live plants (water sprite wisteria). The inhabitants are 2
Bristlenose Plecos, 8 black-skirt tetras, 8 white-skirt tetras, 11 minor
Serpae tetras, and about 6 apple snails. The Serpae tetras were
introduced about 2 weeks ago and my quarantine tank currently is housing
some baby Gold Gouramis, so
I chose not to quarantine them. I know I should have, but I have never
had any problem with the tetras from this source. A bad decision on my
part, but anyway, may I explain the problem to you...?
<Fire away.>
Oddly enough, the other fish in the tank seem to be still healthy and
unaffected by this disease bothering the serape tetras. It is the
strangest thing I have ever seen. The first sign is a very pale area
where the dorsal
fin meets their body. It's very clearly delineated and easy to see
against their red-orange background. Soon after that, the dorsal fin
degenerates and the fish seems to die within a day or two after they
reach that stage.
They don't seem swollen and neither do they show any other signs of
illness. I have never seen fin rot behave like this or fin rot that just
affects one species of tetra. Today, I got some API Triple Sulfa and am
planning on giving them the entire course of treatment as directed by
the manufacturer. Do you think that I am on the right track here? Please
advise and thank you so much for your time and any comments you may have
for me.
<Serpae Tetras are notorious fin-nippers, so one explanation is that
they're fighting within the group (which they do, especially when
feeding) and damaging one another. When feeding they have a feeding
frenzy
behaviour, but will also bully weaker specimens, even killing them.
Usually they attack other fish too, but the Black/White Skirt Tetras
(both Gymnocorymbus ternetzi) are pretty pushy, fast-moving little fish
themselves, and may be holding their own just fine. Gouramis, though,
are easy targets so I wouldn't mix them. This said, it is rare for
Finrot to kill fish within a couple days. Adding more Serpae tetras
might help, by
spreading out any aggression, but before doing that you'd want to
observe the Serpae Tetras and see if they're chasing or nipping each
other. If they are fighting, adding a few more could be a good move.
Alternatively, you might simply have a "bad batch" of Serpae Tetras, in
which case medicating for Finrot might stabilise things, giving you time
to see if they can be saved. If the fish get better, then no harm done.
If they eventually all die, I'd recommend not buying Serpae Tetras
again. Although cheap and usually extremely hardy, they aren't well
behaved fish, and there are better alternatives such as Red Phantom
Tetras out there.>
Riobhcah
<Cheers, Neale.>
Tetra issue. Moenkhausia injured, living
solo 11/14/11
Hello!
<SP>
Well I'm not entirely sure what to do about this fish. Early
September, I was placed in charge of a 55 gallon tank here at my
school, first thing I did was get the water levels how they should
be.
<Good start>
There were small amounts of ammonia and nitrite (less than .5 ppm, but
I was not happy with that)
<Me neither>
and the KH was non existent while the GH was way over 30 (I stopped
counting is was so bad). This tank is stocked with tetras, patties,
barbs,
<Mmm, what species are these Barbs?>
mollies and Pleco. Everything seemed just fine, I started putting
AquaSafe in the tank (slowly to ensure the fish acclimated correctly,
they had been adding straight tap water for over a year and the Ammonia
and Nitrite levels here are insane).
<In the source water? This is bad... would not use for my potable
purposes w/o running through a reverse osmosis device first>
Everything was fine, we lost one fish (had been purchased from Wal-Mart
and it looked slightly discolored when I started). Well, about a week
ago now, I noticed that there was this huge blackish/brown spot on the
right side of the Lamp Eye Tetra. It was swollen, so I pulled the fish
and it has been in quarantine ever since. I watched it the first couple
days and smaller spots began to appear on other areas of the fish, so I
started adding Rid-Ich
<Mmm, I wouldn't do this. The active ingredients are too
harsh... Formalin and Malachite Green>
(which has worked on everything I've ever come across without
issues) and the smaller spots went away, but the swelling on that one
spot has continued. I've never had anything require treatment for
more than four days, so I stopped treating yesterday.
<Good>
This spot now has some slight red around the edges of it now.
<Healing>
The fish is eating and swimming fine, but I'm not sure what else to
do.
<Nothing... other than providing good care... water quality and
nutrition wise... Likely this Tetra has been bruised... perhaps from an
altercation w/ another fish here, maybe just a "bump" into
something hard. Will heal on its own in time>
Nothing has changed in the tank in a month and a half and I even added
a female Molly and a Dwarf Gourami to the tank (quarantined and added
after the tetra had been removed, so they did not cause this). This
fish is about 2 inches nose to tail and they are expecting me to
magically cure this fish, but I'm unsure what to do for it right
now. At this point, I don't think it's Black Spot. The only
time I seen something even close to this before was on a female guppy
who developed an internal tumor, was black and swollen, she died within
a month.
Current tank stats:
Ammonia: 0, Nitrite: 0, Nitrate: 5, KH: 2, GH: 29, pH: 7.0, Temp: 72-74
degrees (depends on if the lights are on).
<Mmm, given the mix of species, this water is fine>
Thank you!
Confused Student.
<And a note re this fish, Moenkhausia spp. are strongly schooling
species.
Really will do much better kept in a small group. I'd add a few
more. Bob Fenner>
Question about spot on neon's mouth
3/26/08 Hi folks, I have a 10-gallon tank with a male Betta,
two neon tetras, a frog, and two algae eaters (the kind that stay
little, not sure of the name). They have all lived together for
several months. I clean the tank every other week, this usually
keeps the nitrates under 10. <Neons need to be in groups of 6
or more; in smaller groups they are stressed and unhappy. Please
note that fish couldn't care less about cute names. But what
they want is that you work around their biological needs. In the
case of Neons, that means company! Keeping them in too-small a
group is animal cruelty, however you choose to rationalise
it.> One of the Neons (Zippity) has a dark spot on his lower
lip. I recently had a problem with stringy algae and thought he
may have gotten some stuck on his mouth, but it hasn't come
off in a couple of days. He is able to eat. Should I put him in
the hospital tank in case he is sick and could pass it along to
the others? <No. It may simply be physical damage, in which
case it will heal. But do also be aware that things like Mouth
Fungus and Finrot can start as small blisters or sores. So as
ever, check your nitrite level before you do anything else.>
Also, should I be adding aquarium salt to the tank? <No.
Almost all fish diseases come down to water quality issues.
Almost none come down to not using salt!> I don't now
because I thought I read that Neons don't like salt, but did
read that it's good for disease prevention. <They
don't and it isn't.> Thank you! Alice <Cheers,
Neale.>
Re: question about spot on neon's mouth
Thank you for the advice. I will keep a close eye on the spot.
The two Neons are the last two from a school - I will make sure
they find a new home with other Neons as soon as he recovers.
<Very good. Good luck, Neale.>
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Tetra Not His Old Self - 1/6/06 Hello again. Thanks for
the information you sent me! I have one other question for you. I got a
small fish from a friend last year and It looks a lot like a Tetra. The
fish was wobbling while trying to swim so I place him in a hospital
tank for about 5 days or so and treated him with Erythromycin 200mg and
he is swimming a lot better and his breathing is good. My problem is
when I placed him back in my regular tank he stays about 4 or 5 inches
from the top of my 60 gal! Should I treat him with something
else or any ideas you can come up with? Thanks again Ian < I am not
a big fan of blindly treating fish. The sounds more like an
accumulation problem and not really an illness. Reduce the lighting and
see if he starts to mingle with the other fish after awhile. Give him a
little time to get back in the pecking order.-Chuck>
Upside down catfish and skinny tetras 09/13/2005
Hi everyone at WWM, <Hi, Cobina!> I am enjoying your site and I
have found some information that I found interesting and will hopefully
put to good use. <Ahh, glad to hear it.> I have a couple of
questions, but first I wanted to give you a quick rundown on the
occupants of my ten gallon tank. <Okay.> This is my first tank
and I have had it for less than a year. The tank came with one painted
tetra (pixie) and one upside-down catfish (Dixie, I know creative
huh?). So I got a couple more painted tetras and one more ud catfish
for company and tried to give them lots of hiding places (as the person
before had just a bare tank). <Some words of caution,
here.... "Painted" tetras are typically tetras
that have been artificially dyed; this process is quite stressful to
fish and can be quite harmful. I believe that fish that go
through the dyeing process usually are very susceptible to
disease. Please don't support this by purchasing any
more of these "damaged" fish; rather, give yours the best
care that you can to help them recover. With luck, they will
survive and eventually regain their natural state and
color. I would also like to caution you to the size of
upside-down catfish; please read here:
http://www.wetwebmedia.com/FWSubWebIndex/mochokids.htm >
Recently (almost three months ago) I found a beautiful polka-dotted
loach, and a female Betta and added them to the tank. <Getting a bit
full, there.... Any plans for a larger
tank? Might start thinking about it if space and money
allow.> For a long time they seemed to get along very well. The
Betta seemed to almost become another member of the tetra family, as
she swam around with them often, and although the loach was kind of
pushy under the wood with the catfish, he didn't seem to nip at the
others (other than the first day when I assume it was him that ripped
the back fin of one of my tetras). <Actually, I would guess that
another tetra was responsible.... but it may have been the
loach. Many loaches (not all!) can get quite aggressive.>
Then a few weeks ago the water got cloudy shortly after a regular water
change and I couldn't get it unclouded. <Possibly a sign that
your tank just has too much fish/bioload for its capacity.> Then
when I realized that my daughter had inadvertently switched the washing
pail with the fish pail, I was absolutely mortified. <Yikes!> But
before I realized that my Betta had committed suicide and jumped out of
the tank while we were asleep and we didn't find her until the next
day (poor thing). Also during this time my loach was getting quite
aggressive and nipping at the other fish, and two of my tetras are
getting really skinny. <Possibly long-term results of being
dyed.... Also, I begin to suspect poor environmental
conditions.> I finally got the water in order and started giving my
bottom feeders sinking pellets so that the loach would hopefully stay
at the bottom and not bother the tetras. The catfish didn't seem to
be particularly interested in the pellets, as they would go right past
(or over) them while scouring the bottom of the tank. I
thought maybe the tetras were stressed and that's why they got
thin. But after reading your site, I am thinking that maybe they have
internal parasites. <A possibility, but in all honesty, I would look
to environmental causes first. Please be testing for
ammonia, nitrite and nitrate.... Maintain ammonia and
nitrite at ZERO, and nitrate below 20ppm.> I am just beside myself
with guilt and worry. They don't seem to be getting any fatter
after having good water. If it is parasites, is there any kind of
treatment? I don't want to see them just wither away to nothing.
<First, test the water, and go from there.> Another thing I was
wondering is that Dixie (my first ud catfish) sometimes gets a big
belly when he/she eats a lot. But my goodness, his belly is at least
twice as large as I have ever seen it. It is even sticking out on the
sides. He seems to be quite happy though, as far as I can tell. Then I
thought maybe he's pregnant. Is this possible? I would love to have
baby catfish, but I don't know if they even breed in captivity, and
I am certain that I would have to maybe set them up in another tank so
the loach wouldn't get at the fry. <I rather doubt that it's
a pregnancy issue - but if it is, there will be a lot of research
you'll need to do prior to being capable of raising the
fry.... Figure out what species they are, and start
searching.> Or maybe he's just super fat because maybe he pigged
out on the pellets after I went to bed. <Entirely possible.> So
my questions are really: 1) Do you think that my tetras have internal
parasites, and if not what do you think it might be, and if you think
they are parasites how do I treat them. I don't have another tank
to put them in to make a sick tank. I have a one gallon tank that I
have a male Betta in, but it doesn't have any filter system of any
kind. What are your thoughts? <Currently, there are too many
possibilities to narrow down what might ail the tetras. It
may be completely outside of any ability to treat, if it is a health
issue related to the dyeing process.> and 2) Do you think my ud
catfish is pregnant, or just really fat from pigging out on pellets, or
worse I hope he isn't sick. <Hopefully not sick. Just
observe closely for a while, and by all means test your water!>
Anyway, I know it was a long explanation, but I wanted to make sure you
got all the pertinent information that you may need to assess my poor
fishes. <The more information, the better. Thank you for
being so thorough.> I really enjoyed your website, and was very
encouraged by the amount of information there. <I'm very glad to
hear this!> I really appreciate the fact that you accept questions
and that you take the time and effort to share your expertise with
other fish lovers like me who are sort of new to the game. <Thank
you very much for the kind words - and chin up, whatever the outcome
for the tetras, I am confidant that they are in good hands with your
compassionate outlook.> Thanks
again. Sincerely, -Cobina. <Wishing you
well, -Sabrina>
Upside down catfish and skinny tetras - II - 09/15/2005 Hi
Sabrina, <Hello!> Thanks for all of your advise, but I am sad to
say that the two tetras died the same night that I wrote the email. I
found them in the morning. <I'm so sorry to hear this,
Cobina....> I had the ammonia, nitrate, nitrite tested a few days
before they died and they were fine. <It doesn't take long for
water quality to go from fine to lousy.... It would be a
good idea to get your own test kits (preferably liquid reagent kits
instead of dipstick-type) so you can test whenever necessary.> And I
even had the water tested for phosphate because of the possible soap
poisoning but that was fine too. A week and a half and two water
changes earlier the ammonia was high. Now after taking out
the fish yesterday, the water was really stinky (not normal),
<Likely water quality had declined from the decaying fish.> so I
did a partial water change and scrubbed down the rocks from inside the
tank. It smells better now, but I need to get it tested just in case
things are funny. <Agreed.> The catfish have been hiding so
I'm not entirely sure if Dixie's belly has gone down, but I
suspect that it has. Thanks for the link about the ud catfish. You
startled me there, I thought that you meant that they would get really
big like the Plecos do, but they say they only get to about four
inches. <A four inch fish, with so many tankmates, is a little large
for a 10 gallon tank, though.... As these guys grow (and
they will, though perhaps slowly), you will want to consider something
larger.> I don't know why mine aren't growing. Dixie, my
first one is at least two years old (and is maybe two inches long if
that) <Uncommon.... Nutritional deficiency or poor water
quality can inhibit a fish's growth and "stunt" it; do
you know what conditions she had with her previous owner?> and the
other newer one, I got last October or November, and who knows how old
she was when I got her, she is slightly (but not much) bigger than
Dixie. <It's all just a matter of time.> Dixie came to me
with stumps instead of fins, I guess being in a bare tank with only red
rocks and one tetra, the tetra probably chewed them off. But now they
have grown back. They aren't as full as the other catfish, but at
least now he has fins. <A major improvement, to be
sure! And a sign that your care is a big step up from what
he'd had, perhaps.> As far as overcrowding, I thought I was
doing good. I had up to seven at one time but usually it has been five
or six.
<Seven? Five? Six? What? Fish?>
The tetras are probably an inch long each, the two catfish together are
four, that makes 7 and the new loach is probably three inches so that
makes 10. <Aim for their adult sizes, and add those
instead.... Furthermore, the cats may get territorial as
they grow (though not really "aggressive", I don't
think), so a bigger space again might be good.> I guess I didn't
think the catfish were that big. They just seem so small. It was only
the five (the three tetras and the two catfish) for the longest time
until a couple of months ago. Maybe I should cut it back to that again.
<Or just get addicted to fishkeeping and get more or larger tanks
(grin)!> I am trying to think about what I can replace my tetras
with (I still have one left that I want to be able to integrate with
the new fish). and I think I may have to find a new home for the loach,
he is beautiful to watch but he is possibly too pushy with the catfish,
especially if I want to try making catfish babies in the future (if
that is even possible). <Agreed, wholeheartedly. The
loach's behaviour will not improve. I would try to find
him a new home if possible.> I would Love to get a bigger tank, or
maybe run this one and then a larger one with other fish. I have plans
to do that when the funds allow for it. <Sounds excellent.>
Anyway, I wanted to thank you again for your advice and getting back to
me so soon. <Sure thing.> If you have any suggestions on what you
think might be a good tankmate for the catfish and my lone tetra, I
would be delighted to hear your suggestions. <Other tetras might be
a good plan, since they are schooling fish - but please do try to stay
away from dyed fish.> Thanks again. <No problem> Take care,
and know that your advice goes far with us new fish lovers. <Thank
you for this - you are very kind!> Sincerely, -Cobina
<Wishing you well, -Sabrina>
Pregnant neon 9/5/05 Hi, Please help-I think I've
done something awful. I set up my new tank yesterday, but because the
above neon seemed to be harassed by other fish I put the fish in the
new tank. She seems very stressed, swimming in jerky
movements, in circles. I have turned the light off . My
predicament is: Should I put the fish back with the others or put
another neon in for company? Please advise. <I would add another
neon to this ones tank> Regards and thanks for your assistance
Jacqui <Bob Fenner>
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