If it is dropsy, you should see a pine cone effect all over the fish's body. Very little success has been attained with dropsy...but if you're not sure..best to post a pic up? Esha is really good, I've used it many times, it's good for sensitive/delicate fish. You could try treating...Look at the lable that comes with the meds should be a chart inside with symptoms and then it will diagnose what you have. Personally I wouldn't go by it but if it is dropsy you should have a shot at trying to treat the fish for it and see what happens.
good luck
