Fritz For the treatment of infections caused by ich, flukes (Gyrodactylus), anchor worms, velvet, and other external parasites, Coppersafe is a stable, non-staining chelated copper concentrate that is safe. After treatment, Coppersafe will continue to function for more than a month due to its high stability. When used as prescribed, Coppersafe is intended to maintain a therapeutic copper level of approximately 2.0 parts per million. To guarantee appropriate copper levels, make sure to use a copper test that measures chelated copper. Instructions Invertebrates can be treated in a different hospital tank or removed from the tank. Coppersafe solution should not be used with fish species that are known to be sensitive to copper. Avoid using it in reef aquariums. Use 1 cup (8 oz) per 190 U.S. gallons (337.5 L) or 1 tsp/5 ml per 4 U.S. gallons (15 L). Sweets