My goldfish had fin rot disease and had almost died. That's when I decided to try this medicine. By the time it came, my goldfish was half dead. Half fins gone and it was floating around, not able to swim. Must say, I'm AMAZED with what this medicine is capable of. Within 1 week the fins grew back and fish is now completely fine swimming around happily!! It not only cures fish, but also removes chlorine and other bad chemicals. All in one. (Note- don't use this medicine with other medicines. If u want to use, use only this. Don't mix) highly effective. Go for it without thinking twice.