At our LFS a woman brought in a Bala that outgrew her tank. We bought it, a nice 7 incher and brought it home. After all that moving it was a bit scuffed up and quickly developed a little fin, mouth and eye fungus. Never having tried it before I decided to try Melafix and the condition quickly went away. After 5 days the water parameters were still great, so I went the recomended 7 days and then did a water change. All the fish are doing great, they seemed to enjoy the Melafix 'bath'. I was so greatly impressed with it myself that I tried it on my hemorrhoids with only a small, uh, consequence...