Hi All, I have a few sick fish in the tank and I would like your opinions on what it may be. I have been looking all over the site and the web for what this may be but I have 3 different fish sick and they all seem to have different symptoms. Facts: 60 Gal tank no new fish moderately stocked with tropical fish no live plants water perimeters unknown as I am currently treating the tank(didnt think I would get a proper reading with tank being medicated) using melafix and pimafix on day 4 of treatment The sick (with visible signs)1 tetra(fin rot and weird bumps) and 1 silver dollar(pop eye and a black mark on his side) Dead: 1 platy with no visible signs other than labored breathing and resting at the bottom before death 1 dwarf gourami with open sore and labored breathing 1 dwarf gourami with no symptoms Im not sure what is going on in the tank and I am treating with Melafix and Pimafix. From what I am reading possibly a bacterial infection? Not sure since we are getting several symptoms. Any Ideas?