Everything available (not all at once of course), myaxzin, interpet fungus and finrot, waterlife fin rot, salt, mythelene blue baths, the only people's antibiotics I could find. It has really been more than the fin rot though, he has had problems that have reoccurred for several months including his cloudy eye despite his water stats being absolutely ideal. The only time my water stats fluctuated was after the antibiotics.
I haven't euthanized him yet. But at this point he has had no improvement, his areas of fin rot have swollen and look like sores now, he has a twitch that I think looks more like a pain response and he only swims at the top of the water (not gasping) but seems unable to swim down in the tank yet doesn't have the symptoms of swim bladder.