Waterlife ParazinFish lice (Argulus), anchor worm (Lernea), gill maggots (Ergasilus) are just some of the horrific parasites or predators which can attack fish and are almost invisible to the naked eye. New Parazin destroys these and other insect and crustacean parasites or predators found in aquaria. This is a unique and revolutionary product that usually only requires one dose per infestation. For use in tropical freshwater and coldwater aquaria. Features: Destroys