3 days ago I noticed my betta had a small bulge and was acting very lethargic I automatically assumed I overfed him and planned to do a 3 day fast. I moved him to a 1 gallon hospital tank just to be on the safe side. Well over these 3 days his bulge/bloating has gotten worse not better and he is constipated cause he has not pooped at all. He is in a 1 gallon bare bottom tank so I can watch for poop but nones happened so far. Well today he has started to have some discoloration on the top of his head and the underside of his belly. Given all the symptoms combined I am starting to think he doesn't have sbd or constipation but possibly dropsy. I dosed his hospital tank with aquarium salts and melafix (I have read many different conflicting opinions on it but it's all I have on hand I would have to order any antibiotics online my lfs doesn't carry them) and gave him a Epsom bath for 15 minutes. He tolerated the bath and didn't pass out but he also didn't poop. Originally he was headstanding but has since been floating normally but he is on the bottom of the tank hiding behind the thermometer and won't really move unless its to get air. He is a tough little guy and hanging in there but I'm scared if this is dropsy it would be way to far advanced to try and save him. His scales aren't really pineconing just a tiny bit around the bulge but im guessing that's just cause how bloated he is. I tried to give him a tiny piece of food to see if he would go for it and he just ignored it. His hospital tank is filtered ( I removed the carbon cause I have melafix in it) and heated to 78 ( I can't adjust it it's a automatic 78) what else can I try. Should I do a 100% water change in his hospital tank and use Epsom salt instead of aquarium salt? Like I said above he did get a 15 minute Epsom salt bath today. He can't really swim all that well so I have only about a .5 of water in his hospital tank at the moment. 3 days ago he was perfectly normal swimming and energetic and happy and bubble nesting now he seems like he is on death's door. I plan to continue the fasting for a few more days as well as 1-2 daily Epsom salt baths and daily dosing with melafix. Is there anything else I can or should do for the little guy?