Description Copper treatment for many parasitic infections – must be monitored in an aquarium or a pond. The copper level can drop too low for the treatment to be effective or can increase to a point that is detrimental to fish health. Copper is likely even present in your tap water. The COPPER TEST KIT allows you to easily and accurately monitor copper levels to maintain copper-based fish treatments at therapeutic levels, and tests copper levels from 0 to 4 ppm. The kit measures both free and chelated copper and is for use in fresh and saltwater aquariums, or ponds. Contains 90 tests and includes 1 test bottle, easy-to-ready instructions, a glass test tube, and a color chart.