Don't Use Bettafix and Melafix
 

I'm surprised people keep buying them. They either do not work, or are harmful. Melaleuca is a toxin from tree bark which damaged the labyrinth organ of anabantoids (see Bettafish.com). Melafix has been shown to cure very mild fin rot and is ineffective against other illnesses. There are dozens of articles criticizing Melafix online. More people need to read them before they treat fish with a placebo, or worse.