AquaChek Silver 7-Way Pool and Spa Test Strips be offering 7 vital tests on a single strip. In lower than a minute, you’ll see results for 7 key parameters including total hardness, total chlorine, total bromine, free chlorine, pH, total alkalinity, and cyanuric acid. The strips test faster and are more straightforward to make use of than liquid dropper test kits. AquaCheck Silver offers enhanced colors for better readability. This set features an improved test for cyanuric acid (also referred to as stabilizer). These strips assist you to test cyanuric acid as much as 300 ppm (mg/L), a higher level than any to be had liquid kits. This cyanuric acid test works in pH between 7.0 and 8.4 and in Total Alkalinity at or below 240 ppm. For a clean, healthy, and happy pool, test twice a week with the AquaChek Silver Pool And Spa Test Strips.