Animal Stories - Fish Disease and Treatment


Animal-World Information about: Fish Disease and Treatment

Introduction to aquarium fish diseases and treatments.
Latest Animal Stories
shubs - 2013-08-04
I have two silver angels. There is no change in their behaviour or apetite. Their appearance has also not changed. It's been two months now, suddenly both of them are showing red marks near mouth and fins. These marks are growing day by day. Are they diseased? If so what should I do? Suggest asap.

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  • Jasmine Brough Hinesley - 2013-08-04
    Red streaks are a classic symptom of a bacterial infection. Usually the best way to get rid of this is by treating the water/fish with antibiotics. These include Tetracycline, Penicillin, Acriflavine, or Chloromycetin. I would try that first. Good luck!
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maria - 2013-07-26
i have just seen one of my fresh water fish has a really swollen body and has blood over the bottom half what is it? and will it kill the rest of my fish? i have a baby bi-orb do i need to treat the water? please help

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  • Clarice Brough - 2013-07-26
    Bloating can be caused by a bacterial disease. Usually bloat doesn't cause bleeding externally, but can result in red streaking on the body or fins. Bleeding may be the result of injury, possilbe another fish nipping at the ill fish. Things that can cause bloat in most fish are a poor diet, and/or poor water conditions. Changing the diet and offering occasional live foods can often help. Antibiotics can be used as well to fight the infection. Read the section above about types of fish diseases (see bacterial), also see the section on Dropsy for the most common type of fish bloat and how to treat.

    The Baby Bi-Orb is a really small tank which makes water quality tougher to maintain. Being around 4 gallons in size, it can really only support a single Betta or about 4-6 very small fish, like Guppies or Neon Tetras. Feeding needs to be closely monitored so excess food is not left in the tank, and partial water changes need to be done on a regular basis.
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morad - 2013-07-14
Some of my fishes started to get small black spots on their bodies how can I cure them? Pease help.

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  • Jasmine Brough Hinesley - 2013-07-24
    If it is black ich, which is caused by a parasite, it probably won't hurt them, but is easy to cure. Just go to a pet store and look for an available black ich or black spot treatment. You could also try a salt bath on just the fish.
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Deborah Proctor-Brown - 2013-07-04
We have beeen having a lot of problems with my grandsons new tank. We have had it for about 2 1/2 months now and have lost several fish in it. Some very quickly, and some after about 2-5 weeks of acting strange. I have had my water checked, and adjusted it or changed the water accordingly. Changed my filter packs often, But after water changes on several occ, even partial changes, the fish seem to be gettng shimmys, followed by a listlessness, keeping to bottom of tank a lot except for feeding time, and gradually getting off balance and gradually dying. Could it be something in our water, from the pipes, or do they just have swim bladder disease going on? No red streaks, growths , or fungi present just shimmys and off balance with loss of weight, wasting away and off balance. Only one aquarium so far having this problem out of 4. So seems like a disease of something, more than water problem. Deborah

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  • Jasmine Brough Hinesley - 2013-07-09
    Well, there could be any number of things wrong. First, if you use tap water, do you make sure to put dechlorinator in? Also, make sure to perform water changes regularly, but only change out 1/4 to 1/3 of the water at a time. Have you had all 4 aquariums the same amount of time? If the other tanks are older, they are probably already equalized correctly, with the right amounts of nitrates and other parameters. The new tank may just need more time to cycle and establish itself.
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jade - 2013-03-10
I have a goldfish that I have had since it was hatched in my pond, about 10 years ago. I have had it in a huge tank for many years now, and it has been growing large. Lately it has been getting round lumps under a scale, then the scale falls off leaving a white scar and the lump goes away. Much like the gold fish on your homepage picture. It also has some small white dots on its forehead so I have been treating it for ich, but they are only a little smaller and the treatment time has been exceeded. I am getting ready to do a water change and put back in my carbon filters. Any ideas about what is wrong, or what else I can do?

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  • jade - 2013-03-14
    Thank you I will try this!
  • Jeremy Roche - 2013-03-12

    Lumps and bumps that suddenly appear are usually infections. If due to bacteria, it usually resolves by rupture (like a boil) pretty quickly. The white liquid that oozes out is pus that is formed when the white blood cells ( immune cells) die while killing bacteria (in general). DO NOT TRY TO POP OR SQUEEZE THE LUMP. Like a boil in humans, squeezing can cause regurgitation of the pus into the blood stream of the fish with deadly results. It is also not a good idea to seal a draining wound unless it is bleeding. The most common bacteria of GF is Columnaris and aeromonas.



    Wounds that are white on the edges and red in the center are aeromonas. Those that are red on the edges and white in the center are generally columnaris. Both are gram negative bacteria TMP-4 is a sulfa antibiotic with trimethoprim which can be put in the water and mixed with food (that is what Romet B is). It is still effective against most, but not all gram negatives bacteria.



    It is very important to move fish with wounds to a new bucket of freshly aged and salted water every day to move them away from bacteria and/or parasites in the water.


  • girish patil - 2013-06-20
    i have 430litre tank with 2jbl 1501filters waterchanges every week water cond seacemprime ph temp are fine ihave twelve severum fish two big sverum fish stomach is fat ithink they are effected by tuberculosis i am from india and her with dont get kanamycin tab but injection are avalible ,metriziole tab are avaliable so what do i do to save my fish ,my fish eat well
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sunmeet sandhu - 2013-06-18
i have 6 golden fishes....around 1 year of age. now turn by turn 3 of the fishes have lost their eyes, abdomen bloated and died within 3 days. I am clueless what to do...plz help

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  • Clarice Brough - 2013-06-18
    My guess is their environment has problems, either the size of the aquarium or the water quality... or both.
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Kathy - 2013-06-05
I have a beautiful orange lionhead goldfish 6 years old in a 35 gal. tank with 3 other fancy goldfish, 3 wks. ago notice the fish floating upside down the fish positions itself under the filter. Thought of swim bladder disease several times taken out of the tank and fed thawed frozen peas. He always eats quite a bit. Also treated the tank for bacterial infections. NO luck at all! everything I see about swim bladder disease seems to be most common in Lionhead goldfish I am almost convienced the problem is he is to head heavy and can no longer swim upright.

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  • Clarice Brough - 2013-06-06
    Yeah, they can have challenges when swimming because of their form.
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Sharon - 2013-06-04
I have an Oscar 10' long in a tank in hard water. I was told the hardness didn't matter but it does. I think that's what is making him lethargic and he hasn't eaten in two weeks. That tends to mess up how his body deals with fluids. How do I soften the water??? The nitrates were high too but after several attempts I fixed that with Nitra-zorb. I've tried Barley and Peat on the hardness and it seemed to help a little but not enough. It's still in the danger zone. Please help me save my friend. He's usually like a playful puppy.

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  • Clarice Brough - 2013-06-05
    The term 'water hardness' is a determination of the amount of dissolved mineral salts contained in the water, which includes carbonates, bicarbonates, chlorides and sulphates. There are several softening methods (ways of removing these salts), each with their own strengths and drawbacks. These methods include using natural additives, using purified water, and using ion exchange resins. Here's the pro's and cons of each:

    Natural additive methods include the peat and barley one you used. The challenge wth these is that they absorbs calcium ions, but at the same time releases organics including tannic and humic acids, which will lower your pH. Driftwood and duckweed are two other natural materials, but the driftwood acts similar to the peat, releasing tannins, and although the duckweed uses some of the carbonates, it is rather minimal.

    Purified water methods include running the water through a reverse osmosis filter (R.O. water) which produces pure water without the salts. However R.O units are rather expensive and you will need to add some aquarium salt back in to provide the necessary electrolytes. YOu can also collect rainwater, though there may be a risk of atmostpheric pollutants and collecting can be a bit of a challenge.

    Ion exchange resins are basically water softening pillows, available from aquarium supply manufacturers like Aquarium Pharmaceuticals and Kent Marine. They remove calcium/magnesium ions by absorbing them and some will even remove toxic metals, but they will become exhausted and then need to be re-placed, or can be re-charged with the use of strong acids.
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Jason D - 2013-05-14
I have a jag chiclid and he has got this bumb on his tail its under the skin it doesnt apear to be a problem for my fish but a worry for myself can anybody HELP

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  • Clarice Brough - 2013-05-14
    This is a really hard problem to identify. Some fish can develop benign growths under the skin from diet or a previous injury. Or it could be a number of other things that would take serious scrutiny To identify/diagnose it, a good resource is the 'Handbook of Fish Diseases' by Dieter Untergasser.
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vikki howe - 2011-09-29
I have 3 parrot fish. One off them stayed in a wee cave I have in the tank for around 2 weeks only popping its head out to feed. When it eventually came out it seems to have developed a growth of some kind on its underside. It is quite a big growth. Can anyone tell me what it is? Or if it is something I should worry about.

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  • Charlie Roche - 2011-09-29
    I don't know what you mean by growth. There are several things it could be and the
    SYMPTOMS are listed in the Animal World Article Fish Disease and Symptoms. Scroll down to the symptoms and the recommended treatement is there.
  • mark howe - 2013-05-28
    take pic
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