http://users.megapathdsl.net/~solo/p...ame.htm#dropsy
sounds like you got columnaris infection. one fish has dropsy or ascites.
http://users.megapathdsl.net/~solo/p...se/disease.htm
look here for treatment.
Ingrid

"William Burbul" wrote:

I have 2 goldfish in 55 gal tank with 2 filters. Lately 2 strange things
seem to happen. the smaller fish (about 3 inches long) has started to get
get a dark brown color all over it. It still seems to act normally (eating
and swimming around and pooping) but what is this dark brown color???.


The other fish is about 4 inches long but lately has puffed up to the size
of a tennis ball and doesn't seem to eat. What's up with this?


tank looks OK and tests pretty normal except for nitrates.




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