Kordon Methylene Blue is used as a very good general cure. It is especially known to help with ammonia and/or nitrite poisoning, acts as a disinfectant or preventative, and cures fungal infections. It is recommended to use in a seperate tank as a bath for 30 min with a dose of 1mL/gal. A needleless syringe for dosing is included with every order of methylene blue. 
**WARNING: It will stain anything it touches, including skin and furniture, sinks, etc. It will also stain aquarium decor and silicone in the tank. Do not use directly in the aquarium because it will kill all the beneficial bacteria in the tank- use in a seperate tank.**