The Aquarium Pharmaceuticals (API) KH Carbonate Hardness Test Kit tests tap water & fresh or saltwater aquariums for carbonate hardness (KH). Can be used to determine the proper dose of pH buffers.
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Orders over $49.99 Ship FREE.The Aquarium Pharmaceuticals (API) KH Carbonate Hardness Test Kit tests tap water & fresh or saltwater aquariums for carbonate hardness (KH). Can be used to determine the proper dose of pH buffers.