API General Cure PowderAPI General Cure Powder is an anti parasitic remedy that treats a wide variety of parasitic diseases including velvet, anchor worm, fish lice, hole in the head disease, gill worms and dactylogyrus. Safe for salt and freshwater tanks. Rapidly treats a wide range of parasitic diseases. For use in freshwater and saltwater aquariums Fast dissolving powder treats up to 100 gallons Directions: For best results, remove activated carbon or filter cartridge