Water Trends 7 In 1 Test Strips 50-Pack

Tests for: total hardness, total chlorine, total bromine, free chlorine, pH, total alkalinity and cyanuric acid (stabilizer). Just dip an 7 in 1 test strip in your pool or spa water for one second and remove it immediately. You get results in seconds! The Select Refill Kit contains a refill bottle of 50 test strips, plus a new insert for the reusable color comparator. You'll find this an economical way to test both pool and spa water. 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.