Cloverleaf Absolute Wormer+ with added pH buffer is a professional strength aquarium anti-worm medication for the protection against internal and external worms. Also effective against Skin Flukes, Gill Flukes, Hexamita, Leeches, and Fish Lice. Treats up to 22,700L. Not suitable for use in aquariums containing any invertebrates, snails, freshwater stingrays, and any other scaleless sensitive species. Highly recommended by Veterinarians, trade professionals, and experienced fishkeepers.