I just saw the post when someone treated dropsy symptoms and i PMed about it i was curious how to treat it and i got this mess back. May be it can help :) I know you did so much already :(
Below the answer on my pm :
No problem! I cannot guarantee if it was the medication or just a stubborn fish. I have been told several times that what I did could not possibly work. The only medication I had at the time was Jungle Fungus Clear, so I used what I had. I had 2 girls survive with this. The only two I treated this way.
I added 1/4 tablet of the Jungle Fungus clear and several(I can't remember how many) teaspoons of epsom salt (for the bloating) to a gallon of spring water.
I moved my little girl back into her bowl from wally world. (The plastic one I brought her home in.) I used the mixture to fill her bowl and changed it out 2-3 times a day depending on how it looked. I kept her in the warmest room in my house since her bowl was too small for a heater. I held off food for the first several days, until she seemed less bloated and the scales were going down a bit. I fed her right before I changed her, so if she didn't eat, the water would be cleaned out anyway.
It took me 2 weeks of this before she seemed well enough that I put her back in the aquarium. The second girl took about 10 days. I still have the second girl, but the first one I lost on her 3rd round with Dropsy, so I think she had something else wrong with her to begin with.