If left untreated unbalanced swimming pool water can irritate swimmers skin and eyes cause sanitizers to work less effectively and even damage pool surfaces structures or equipment. The good news? You do not need to be a scientist to quickly and easily test your indoor and outdoor swimming pool water. The HTH 6-Way Test Kit allows every pool owner to test for six key elements: total chlorine, bromine, pH, total alkalinity, total hardness, and cyanuric acid (CYA). You get quick accurate results so you can balance your pool water as needed. Best of all it works with all pool types including vinyl lined and salt water systems.