temp ok. I use well water so no chemicals.
No other fish in tank.
No other abnormailites. Last couple of months after feeding this happens but goes away after a few minutes. I attributed to too much food since his tank mate died and I may have still been feeding for two without realizing it. Now just give a tiny pinch of food. I dont think condition is from stress because I made a cut out of his tank buddy and have it outside tank where the now dead fish always hang out this one is not going away.
"omega one" gold fish flakes