As most of you know, I have treated my 72 gal for camallanus worms twice. Now it seems as if there is some kind of fungus or something. Yesterday, I noticed a platy with clamped fins bouncing around the bottom of the tank. It was dead this morning. Today one of the neons has a white fuzzy cottony patch near its tail and one of the platys has a small fuzzy dot on its tail. I am getting tired of this tank. I do weekly 40% water changes with aggressive gravel vacuuming. My water params are 0, 0, 10 and crystal clear. I have 2 aquaclear 110's running. I love the fish but it seems no matter what I do, Its always something:;fru:;fru. I just treated with maracyn plus. I am almost ready to tear the tank down and forget about it.:;fru :;dkAny suggestions as to what I may be doing wrong or what is happening would be welcomed.