API® KH Test Kit

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The API® KH TEST KIT tests fresh or saltwater aquariums for carbonate hardness (KH), and helps monitor water quality and prevent invisible water problems that can be harmful to fis h and plants. Carbonate hardness stabilizes aquarium pH, and can be used to determine the proper dose of pH buffers. Contains 1 test bottle, easy-to-ready instructions, test tube and color chart Show more