Do I have a Problem??

SiA

New Fish
Jan 14, 2005
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#1
Argh!!..

I've got a lightly populated mixed tank with 4 white clouds, and 2 Catfish..

One of the White Clouds was found dead tonight.. He looked fine yesterday, maybe smaller and darker than the others, but he was swimming OK. Now looking at the remaining White clouds, one of them has turned dark in colour compared to the others (He wasn't like that a few days ago), and he seems to be getting VERY skinny, and breathing heavily..

Any ideas what's up?

Amonia, Nitrate, and Nitrite are all 0.