When pool water is unbalanced it can irritate the skin and eyes and cause sanitizers can be less effective. Imbalanced water can even damage the pool’s surfaces structure or equipment if left untreated. Quickly and easily test your indoor and outdoor swimming pool water with the HTH 6-Way Test Kit. This pool water test kit tests for total chlorine bromine pH total alkalinity total hardness and cyanuric acid (CYA). Best of all this test kit for swimming pools works with chlorine bromine and saltwater pools. Store the kit in a cool dark place and replace it yearly.