I first thought it was just a fungus and treated with a full course of MelaFix and PimaFix and salt. When that didn't work, I treated with a five day course of Maracyn. Then I tried a five day course of Maracyn and Maracyn II. That gave only a very slight improvement. He's currently in a 5 gallon tank so treating him will be easier. I just finished another course of Maracyn II and PimaFix. Currently I'm trying Maracyn and PimaFix for a five day minimum course. I also just added an air stone to that tank. He either cannot or will not eat. He seems to show interest in looking at food but doesn't try to eat. I've tried bloodworms, brine shrimp, tubifex worms, shrimp pellets, frozen shrimp, algae discs, and flakes. There are snails in the 5 gallon, but he's not showing any interest in those either. He's starting to waste away and I'm afraid I'm going to lose him. I have some vitamins coming that should arrive tomorrow. I'll try anything at this point.
Does anyone have any thoughts on this? Of course he's my favorite and I'll cry over this one

Mindy