I just realized my 3 little clown loaches have ick----someone told me tetra dissolving tablets for ick were safe with all fix..I have plecos, a raphael, algae eater, and dojo loach in there---can I treat the whole tank? I know the drops that I have color the water and are not for scaleless fish...Thanks for your help! Also, my oscar has had about 3 white spots on his left front (transparent) fin for a week or so----never changes---could that be ick? I thought it usually spread pretty quickly. He did scrape his side on an ornament a while back and at first I thought it was from the scrape? Thanks again if you can help Shirley