About This Item Testing your swimming pool water has never been easier. HTH 6-Way Test Strips test for free available chlorine, bromine, pH, alkalinity, calcium hardness and CYA (cyanuric acid) levels. 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. These test strips are great for all swimming pool types including chlorine, bromine and salt water systems. How to Use HTH 6-Way Test Strips Just dip your test strip in the pool water and see results in seconds. Download the HTH Test to SwimTM app, compare your strip to the side of the bottle or text a photo to 484-123. We'll give you personalized instructions in seconds so you can adjust the chemicals in your pool water to keep sanitizers working and ensure healthy swimming. 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.