AquaChek 541640 Select Refill Swimming Pool and Spa 50 Chemical Test Strips

Tests for: Total Chlorine, Total Bromine, Free Chlorine, pH, Total Alkalinity, Total Hardness and Stabilizer (Cyanuric Acid). Ideal for those who have already purchased the AquaChek Select kit and just need additional test strips. A replacement color chart is enclosed with every bottle for insertion in the reusable color comparator. Get 7 important test results in just one dip! Dip an AquaChek Select strip in your pool or spa water for one second and remove it immediately. You get test results in seconds! To keep your pool at its best, test at each end a minimum of twice a week, and test your spa before each use. It’s also a good idea to write down your results each time you test. Tests for 7 important chemistries in seconds: Total Chlorine, Total Bromine, Free Chlorine, pH, Total Alkalinity, Total Hardness and Stabilizer (Cyanuric Acid).