Potentially gill flukes.
You need to do more than float though. You need to also introduce a couple tablesoons every ten minutes several times over. I usually do this 4-6 tlimes.
Smell the tank. Smell like anything?
Test your water,., what are ammonia nitrite and nitrate?
Is he getting pale again too?
I just recently went through a poisoning with my newest boy (fish drama at my house never seems to end..) I've got it narrowed down to a suction cup or some silk plants. Both have a very strong plastic smell that has leached into the tank.. smells mostly like the plants though so that's what i'm leaning toward..By Vibran-Sea
Last edited by callistra; 03-02-2012 at 12:54 AM.