Fritz ParaCleanse treats and controls of a wide variety of parasiticdiseases. Use Fritz ParaCleanse for outbreaks of aquatic parasites including velvet (Oodinium dinoflagellates),hole-in-the-head disease(Hexamita spp. & Spironucleus), fish lice, or gill & skin flukes (Dactylogyrus& Gyrodactylus). This treatment is suitable for fresh and saltwater aquariums, and will not discolor the water.