Cloverleaf Absolute Aquarium Wormer is a pro-strength formula used by veterinarians and professionals for protection against internal and external worms. It is effective against outbreaks of skin flukes, gill flukes, internal worms, Hexamita, anchor worms, leeches, and fish lice. The active ingredient is flubendazole, and it is a ready-mixed formula for treating internal parasites, worms, flukes, and protozoa like Hexamita in tropical and coldwater fish. Discus and livebearers such as guppies, mollies, and platies are most prone to attack from gut parasites. This 50g pack treats 5000 gallons / 22,700 liters and contains an added pH buffer.