Please help diagnose this !!! - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 3 Old 03-18-2012, 05:17 PM Thread Starter
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Please help diagnose this !!!

Hi and thank you for trying to help me on this thread.
I have a 10 gallon cold fresh water aquarium with gold fish and one african dwarf frog
Today i found 3 fish dead with a light white fuz around them.

My frog has only its leg surrounded in this white fuz.

Can anyone help me with figuring what this is?
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post #2 of 3 Old 03-18-2012, 07:13 PM
Byron's Avatar
I can't see much from the photos, but white fuzz is usually some type of fungus. An antibiotic like Maracyn should treat it, if it is fungus.

Something had to cause this, fish suddenly dead. What is your maintenance program, meraning water changes (volume, frequency)? A 10g is not sufficient space for one goldfish, much less more; goldfish produce a lot of waste. The lack of clarity in the water in the photos is undoubtedly part of this problem.

Do you have a test kit to test ammonia, nitrite and nitrate?

Hopefully one of our goldfish experts will be able to offer advice beyond my generalities.


Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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post #3 of 3 Old 03-18-2012, 08:43 PM
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I'm sorry you lost your fish. If you would please answer the questions Byron asked it will help us along in understanding what went wrong here. I would also like to know if you saw anything on the fish that died? Sores? Fuzz? Redness? White spots? How many fish are remaining in the tank?

Byron is right about the fuzz. It's fungus. Fungus is dangerous because once it is internal it will eventually kill the organism. I suspect that is what killed the goldfish.

I'm sorry you received bad information from the pet store employees, but no goldfish can survive long in a 10 gal. The ones you see in the store are babies probably no older than a few weeks. The single-tailed ones grow around a foot long, and the double-tailed, bubble-bellied ones usually get about 10 inches. If you still have goldfish we can worry about tank size in a bit. Right now the main focus is on getting whatever is killing your fish cured.

PS. I also forgot to mention you can click on the shaded fish names to see information about them.


Sitting by the koi pond

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ahhhhhhhhhhhhhhh!!!!!! , dead fish , fish , white fuz

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