YOW O_O THAT IS SERIOS BLOCKAGE Dropsy is when the whole body is like that and nmot just the stomach, he also would have been dead by now >< ouchie what a blockage..hm.... what other things can you try... First I would leave it for a few more days, as long as hes not showing that he's starving o-o
I've had some pictures for a long time of one who ingested gravil by mistake, the person took him to one of those new fishie vets that are poping up everywhere, ask your local vet if he proffesses in fish ? o.o other then that I have no idea what to do other then watch for gasping" a motor mouth" or try to get some mush pumpkin into a net and see if he's interested in laping it, a teaspoon of that is abit much, but let him nibble it for a minute or two and some of that bloat blockage should go down.
Also dropsy is raised scales and no apatite o_o that most defenetly is surly not dropsy O_O I havent seen this in 4 years..
I would think it's swim bladder, but he wouldint be abil to be in that possision if it was... wow.