API Carbonate Hardness KH Test - Fresh/Salt

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(CARBONATE HARDNESS) Tests tap water and fresh or saltwater ponds & aquariums for carbonate hardness(KH), the measure of dissolved carbonate and bicarbonate ion concentrations, als o called alkalinity. * For fresh & salt water * Helps detect stress on fish caused by rapid pH shifts, the result of low levels of KH * Helps to maintain the correct buffering capacity in ponds & aquariums. 1 Bottle Kit. Show more