Tests aquarium water for carbonate hardness (KH) or calcium. Each test kit includes reagent(s), glass test tube with cap, and easy-to-follow instructions. Number of tests varies depending on water conditions. KH/Carbonate Test Kit can be used to determine the proper dose of pH buffers. For use in fresh and saltwater aquariums. Calcium Test Kit allows you to easily and accurately measure calcium levels and maintain a healthy reef aquarium. Uses titration method, with easy-to-see color change for precise measurement. Measures calcium levels as low as 20 mg/L. For saltwater aquariums.
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