When your underwater buddies are being attacked by parasites， you can save the day with Fritz PraziCleanse Fish Treatment. The powerful， aquarium safe formula is a fast-acting and effective anti-parasitic treatment targeting harmful tapeworms， flatworms， fish lice， turbellarians and gill and skin flukes. You can use it in both freshwater and saltwater aquariums， and it won’t discolor the water or harm your plants or uninfected fish. Safe for use with many invertebrates including coral， snails， shrimp， clams and other mollusks. Not safe for use in systems with tube worms or feather dusters—remove these species before treatment or treat in a quarantine tank.