Hello all, I've been away for a while but am back on the forums regularly now. I have a school of 5 Silver Dollars (M. argenteus) They've developed a white coating almost that I'd guess is some sort of fungus twice now. Dosing with Melafix/Pimafix takes care of it in around 3 days though I continue to dose for 5. It seems to affect the fins both dorsal and tail and all of the body. I can't quite tell but is this fish scaleless and therefore more susceptible to fungi? They've grown at an amazing rate in my tank so I'm not quite certain what is stressing them out or making them vulnerable. Thanks for your time.