Dropsy Help . Check out that link. There is usually not much positiveness that comes out when a fish has dropsy. A treatment of Maracyn 2 made by the Mardel company may help. As it states it treats for dropsy.
R.I.P.
Dropsy hard to cure once there scales stick out organ failure.
Neverf wise to keep a sick fish in the tank they have pecked at the body of the dead fish now and that how dropsy spreads.
I would add a bacterial med now with this happening.