Animal Stories - Fish Disease and Treatment


Animal-World Information about: Fish Disease and Treatment

Introduction to aquarium fish diseases and treatments.
Latest Animal Stories
Lucy - 2012-11-26
I have goldfish with white lumps on its head. their is also a human looking white head type thing too. No loss of appetite and nothing has been changed apart from the water. Im really worried it will spread to the other goldfish

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  • Jeremy Roche - 2012-11-26
    First thing to do is test your water parameters.  More than likely it is a  fungus.  There are many fungus medications on the market. Check here for symptoms and links to the medications.
  • Clarice Brough - 2012-11-26

    Hard to say for sure what those bumps are, lots of possibilities. For example if they have a cottony look to them, then it is most likely fungus. Or they could be damage from an injury from sharp objects, a collision, or possibly from tankmates, which has perhaps has become infected. Or it could merely be the fish equivalent of warts, or possibly a tumor of some kind.


    The most important things are that the fish has a large enough tank and really good water quality, i.e. no ammonia, nitrite, and nitrate or less than 20. You are right to worry about your other fish too, but keep in mind that infection does not often run rampant in a tank which has excellent water quality. Keep an eye on them for sure, and you may want to do more research on goldfish diseases if you see any changes. Good luck!


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mike - 2013-01-13
I have a 100 gallon tank with gravel water filters and a canister filter rated for a 200 gallon tank. Recently, I added my quarantined fish that I bought from a very good fish store who quarantined their fish for a month. So these fish have had 2 month quarantine time. Anyways, my fish started to get what looked like fin rot and white spots on their fins. I treated it with malachite green and formalin and removed my carbon filters also. The fish seemed to respond very well to this treatment. Now, they seem to have cloudy cornea's. I just completely cleaned the tank as of yesterday. My question is, should I continue to use the malachite green and formulin or should I switch to a Triple sulfa or Tetracycline type treatment? Thanks for any input on this matter.

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  • Jeremy Roche - 2013-01-14
    What type of fish is it?  How many other fish in the tank?   Many times this this happens from a pH issue.  Could also be a diet issue.  Maybe the fish is not processing or getting the needed vitamins.  I would give them a break on the medications for a bit.
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Evan - 2013-01-10
My dojo loach recently got sick, he has a bent back but not at a strange angle,just consistently bent. Does anyone have ideas because that is the only symptom he is showing. Please reply i do not have much time.

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  • Clarice Brough - 2013-01-11
    Unless the fish was injured in some way, it could be that you are dealing with Fish Tuberculosis. Developing a bent back (spine) is the symptom of this and unfortunately it can't be cured.
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melissa - 2013-01-08
i have a very sick dojo loach. he has a very swollen body & i have been treating it with all the med i can get at the store. ive seen lil white worms but the meds will kill them i clean out the tank & my loach gets a lil better but i cant seem to get rid of whatever it is. please help, the loach is 6 yrs old. i feel soo bad for him. any suggestions?

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  • Jeremy Roche - 2013-01-08
    Have you checked all your water levels?  Could your loach be constipated? Could be chasing the wrong issue.  There are Planaria, tiny non-parasitic worms, live in the substrate in most well established tanks. Sometimes they can be seen crawling on the glass too.

    They are an essential part of the food web and biological diversity in an ecosystem or an established aquarium.
  • Anonymous - 2013-01-09
    thank you for respondind j. ya he seemsvery sick it looks like underneath his bulging stomach its grey like hes full of something? i dont know he is definately not swimming or acting like he is ok? are those lil white worms able to make the fish sick? the non parasityic ones u described? any other ideas?
  • Jeremy Roche - 2013-01-09
    Have you tried feeding it peas to see if it is a constipation issue? Maybe add some Epsom Salt.  Tetras are known to control the worms.  The worms should be harmless if that is what they are.  I'd try treating constipation.  Loach do tend to get over wieght and over eat as they age.
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Suryashis - 2013-01-08
I bought a couple of fantails a week back and it was on the first day itself after bringing the fishes that I noticed one small whitish scar on the tail of one of them. At first I did not pay much heed but over the next few days I saw the number of such spots have gone up in its tail and the previous one has slightly increased in size. No such scars have appeared on its body and the fish is playful as before. I don't think it's ick. Have tried to cure it using salt (NaCl), methylene blue, malachite green but to no avail. Please suggest a remedy.

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Sylvia - 2013-01-06
Hello Sir, I Have 2 Fantail Goldfish. But Since 2 days my one goldfish lips have turned red as if it have put a lipstick on the lips and her eyes r also snowy types and have little redness arouund it. the other one's stomach is bulky like and now it goes at the bottom to breath. it has also reddish colour on one eye. Sir, pls can u help me in curing them.

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  • Jeremy Roche - 2013-01-06
    Sounds like a bacterial infection.  Should be treatable with medication.
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T.j. McCandless - 2013-01-05
Please help! : I have a Red Devil Cichlid its starting to get pits above its gills and a white almost furry coating on its back. this fish came with our tank she's a great fish but i cant tell whats wrong. Any and all insight well be welcomed

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  • Jeremy Roche - 2013-01-06
    Couple possibilities without seeing.

    A whitish-grayish coating on the skin, ulcers, damaged fins, patches on the gills, and erosion of the head tissue, all indicate Columnaris or Cotton Wool Disease, which is extremely contagious. Immediate antibiotic treatment, and disinfecting of the tank is essential. Another highly contagious cichlid disease where disinfecting the tank becomes essential is Fish Tuberculosis.Slime Disease caused by parasites has symptoms of a white coating, reddening, folded fins, and irregular swimming. This must be treated immediately with parasitic medication. Raising the water temperature would also be helpful.
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emma - 2013-01-03
My blood-red jewel cichilid has a red eye that looks like it is puffing up. I think it is pop eye,but I'm just not sure. Can you please tell me what my fish has, and how to treat it? Help!!

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  • Jeremy Roche - 2013-01-04
    Pop eye is normally a water condition problem or an injury.  Seperate fish and treat with epsom salt.   Watch for fungal or bacterial issues that may happen after pop eye starts.  Should clear up with pristine water and the addition of the salt.
  • Jeremy Roche - 2013-01-04
    Pop eye is normally a water condition problem or an injury.  Seperate fish and treat with epsom salt.   Watch for fungal or bacterial issues that may happen after pop eye starts.  Should clear up with pristine water and the addition of the salt.
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Cressy - 2012-11-05
I have an 8 inch oscar in a 55 gallon tank, i recently had to move him to a smaller tank for a short period of time. He was unhappy, swimming around frantically, running into walls, so I put him back into his home. Water conditions are all good, but he is laying on the bottom of the tank and is missing scales, he also has no interest in eating...please help!! I dont want to lose Fred!

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  • Jeremy Roche - 2012-11-05
    Oscars will get a bit of an attitude and pot from moving them around.  The change can be extremely stressful to these fish.  They normally come around.  I would try some of his favorite food or maybe some live foods to perk it up a bit.
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Jo - 2011-08-26
Hi there. My neons seem to be dying one at a time. The develop a bulge on their belly behind their fins. Can someone please tell me what this is.

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  • ashiq - 2011-08-29
    bcoz of costie disease treatment is to dip in the sol of kmno4 or methyl blue
  • Deana - 2012-06-17
    Sounds like you have neon tetra disease for which there is no known cure :( Most say to get them out as fast as you can to try and save the ones you can. If they start to feed on them they will all die. I had a whole tank lost, but a few when I went to a local Pet Store and it was passed to my fish of Many,many years! I was heartbroken:( Clean you tank well.Good luck.
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