KH TEST CARBONATE HARDNESS KH TEST CARBONATE HARDNESS $4.25 SKU: AQP59 QTY: Click here to save 5% off of your order! KH TEST CARBONATE HARDNESS<br />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. 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.