Fritz ParaCleanse treats and controls of a wide variety of parasitic diseases. 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). Suitable for fresh and saltwater aquariumsWill not discolor the waterProvides fast reliefDIRECTIONS:One complete course of treatment will take 5 days. Treat for the full course of treatment even if visible signs of infection or illness disappear. Day One: Add contents of one packet per 10 gallons of water to be treated. Day Three: Add contents of one packet per 10 gallons of water to be treated. Day Five: Perform a 25% water change.