Did he pinecone? I am not going to bother asking you about care since I know that is all good... Three days is fast, but dropsy usually comes on that quick sadly. When was the last time any new fish or their water (anything like that) came into contact with him/his tank? Any recent changes to anything (tanks, food, etc)? Epsom salts are good. How much are you dosing? Does it seem to be helping?
Imports don't tend to last as long as they should. Sad, yes, but even if he does pass he will have enjoyed his life. Could you get some pictures, partially for diagnosis and partially because I want to see the old guy?
Matt I may need your advise here. Superman was just fine 3 days ago. He looked pale and started to bloat yesterday. I tied the usual Epson. I was not too worried seen it before no problem I think. He is so near death right now Im sure he is going to die soon! Im just sick about it...why so fast?