Sentry Industries Inc. Mardel (Virbac) AMD11330 Fresh/Salt Water Fish Coppersafe Solution, 4-Ounce Coppersafe solution contain chelated copper sulfate Recommended for the treatment of ick, chilodinella, trichodina, gyrodcactylus flukes, anchor worms and other external parasites Features unique stabilized form of chelated copper is designed to maintain a therapeutic level of copper that is safe for fish Also features it does not color the water and will not interfere with the biological filter This product weighs 4-ounce