Seachem MultiTest - CopperMultiTest Copper Measures all types of copper to less than 0. 01 mg L Multi cavity plate for simultaneous testing of up to 6 tests at the same time Includes reference for test validation Marine or Freshwater Copper kits are usually of two types: compleximetric or titration based. Some kits measure only ionic copper and others measure both ionic and chelated copper. This kit uses a highly sensitive catalytic compleximetric based procedure to measure