Hello I have read a bunch of different sites on this disease, nut figured I'd ask here since everyone's tank is different. One of my guppies has dropsy. It was just noticed yesterday by my wife. I am wondering if there is anything I can do? I have a 29g with 2 swordtails, 2 Siamese algae eaters, 1 pea puffer (cleaning the snail infestation), and a bunch of guppies that my wife and I breed for color variations. About 1.5 weeks ago one of my swordtails came down with ich. I successfully rid the tank of it through the heat treatment. I was scared to do anything else because of the puffer. The tank temp returned to normal this last weekend. I don't know what would have brought it on. I read it is usually due to something wrong in the water. I tested it yesterday and it had 0 ammonia, 0 nitrites, and about 25 nitrates. The Ph is somewhere around 7...its hard to tell with my test. Concerned with the nitrates I did a 1/3 water change. Just to bring it down lower. Now that I have described everything I can think of, is there anything that can be done? Or is my poor little guy doomed for fish heaven? Please let me know. Thanks!