I am new to having sick fish. I have had tanks for years. Nothing ever got sick. Now, in the last 2 months, I have had what seems like everything possible. Please help. I am trying to learn, but there is so much. I have 3 mollies in a 10 gallon being treated with pima fix and mela fix. The spots and fin rot are gone, but I am still having problems. The grey one is shimmying sometimes. Her only symptom. Her fins are even back up. The white one I has a dark white streak in her top fin. I can't decide if it is something or not. Otherwise she is in good shape. The spotted one looks all better except she won't unclamp her fins. I can't figure it out. Also in my 29 gallon I have 1 pleco, 1 cory, 1 white mollie, 3 danio (glo fish), 6 mollie fry (in breeder net). Something is pooping solid white. It looks normal except for color. I can't catch them, but I keep finding it in there. Is that bad? Should I be worried? 10 gal. is 82degrees nitrate is around 0-5 nitrite 0 water around 65 soft alkalinity around 120 ph 7.2 running aqua tech 5/10 with just bio. & have bendable bubble bar for more air. have small gravel in bottom & plastic plants & cave. I have been treating for 10 days now. my 29 gal. 8o degrees nitrate 0 nitrite 0 soft water aroiund 65 alkalinity around 120 ph around 7.2 running whisper 30/60 filter with carbon and the bio inserts. Also have ario2 w/led on the other end for more air. I have marble on bottom with plastic & real plants with fake long tenticle anemones w/ rocks. Please help me figure this out. I have lost enough fish. Also this molly hides most of the time. Could it be becouse she is the only mollie in there now? Any help or info would be greatly apreciated.