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 saltwater systems. How to Use: 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. For best results, use the HTH 6-Way Test Kit to test and balance your pool water two or more times weekly. Store the kit in a cool, dark place and replace it yearly. WARNING: Do not dispose of test solutions in swimming pools or spas. Rinse cells before and after each test. About HTH Pool Care: HTH was developed with the pool owner in mind. We know that maintaining your pool water can be a lot of work. That’s why we're here every step of the way, helping you clear the uncertainty from pool care. With economical, easy-to-use solutions, HTH is designed to work hard so you're prepared to tackle whatever life throws in your pool. From balancing your water to treating green water, we offer a full line of products to keep your pool water healthy and your swimmers happy.