What is the best medicine for treating fish body fungus?

My fish have this fuzzy white cloud looking fungus.What is the best medicine for treating fish body fungus?
Try to get this Prazi-Pro. Melafix is good for wounds, and pimafix is good for most fungus and infections. PraziPro will work against flukes (also gill flukes). It is much used by discus owners. It contains Praziquantel, which will kill the parasites by making them contract themselves to death. So there's a little bit risk with using it. The parasites can burst under their contractions, and that will lead to infections. I haven't tried it on my puffers, but I know discus owners say you have to overdose it pretty much.What is the best medicine for treating fish body fungus?
Maracyn, it's kinda expensive but it works really well. Jungle products are also really good, and a bit more inexpensive.
I think its called Melafix, you can get it at any fish/pet store and it will be in a blue bottle.