Our Bromine strips from AquaChek include a test for Total Hardness since warmer water temperatures increase the potential for scale build-up making it particularly important for spa owners to maintain proper hardness levels. Get 4 important test results in just one dip! Dip an AquaChek Red 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 4 important chemistries in seconds: Total Bromine, pH, Total Alkalinity and Total Hardness. User friendly easy-grip bottle with flip-top strip dispenser cap.