Shake well before each use. For best results, remove activated carbon during treatment. As a disease treatment: Add one teaspoon for every 10 U.S. gallons of aquarium water. Repeat dose daily for seven days. Treatment may be continued if necessary. Rapidly treats fungal infections on body and fins as well as treats internal and external bacterial infections. Does not discolor water or stain decorations. Works in both fresh and salt water. Specially formultated to work with MelaFix. Natural botanical remedy made from pimenta racemosa oil, a West Indian Bay oil.