About This Item 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 don't 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 6 key elements (total chlorine, bromine, pH, total alkalinity, total hardness and cyanuric acid or CYA). You get quick, accurate results so you can balance your pool water. Best of all, it works with all pool types, including vinyl-lined and salt water systems.How to Use HTH™ 6-Way Test Kit Collect a water sample approximately 18 inches below the surface (deep enough so the water reaches your elbow). Hold the bottle vertically to dispense the test drops into the sample.