Seachem Cupramine Copper Medication Effectively eradicates oodinium, cryptocaryon, amyloodinium, ichthyophthirius and ectoparasites of fresh and marine fish. Superior to copper sulfate, chloride and citrate. Non-acidic, less toxic to fish, remains in solution and does not contaminate the filter bed. Superior to chelates because it is fully charged (ionic), active at low concentrations and removable with carbon.