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The carbonate hardness (KH) of aquarium water should be tested frequently, since water with a low KH is subject to rapid shifts in PH, greatly stressing fish and making them vulnerable to disease. The kit measures carbonate hardness, the measure of carbonate and bicarbonate concentrations in the water. The proper KH levels is an important part of water quality and is necessary for the health of fish and the development and growth of aquarium plants. Kit contains dropper bottle for accurate dispensing of test solution, easy to read instructions and color chart, non-staining glass test tube with snap-tight cap.

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