HTH Pool Care 6-Way Test Strips for Swimming Pools 0.5 lb. Contains 35 each. The quick and easy way to test and adjust the 6 key chemicals in your swimming pool now with even more accurate results with Google Cloud Vision technology. Testing your swimming pool water has never been easier. 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 saltwater systems.