Insta-Test® Pool 4 Plus Test Strips, 50/bottle

The Insta-TEST ® POOL 4 Plus pool & spa strip measures Free Chlorine 0-10 ppm, Bromine 0-20 ppm, Total Alkalinity 0-240 ppm, pH 6.2-9.0, and Cyanuric Acid (Stabilizer) 0-250 ppm. This test strip is a dip-n-read strip with instant results. The Insta-TEST ® POOL 4 Plus strip is ideal pool strip allowing the user to measure the most important test factors. Each bottle includes 50 test strips packaged in a waterproof PopTop bottle with a molded desiccant liner, which protects the strips from moisture and UV light. Test Factor Range Free Chlorine 0, 0.5, 1, 3, 5, 10 ppm Bromine 0, 1, 2, 6, 10, 20 ppm Alkalinity 0, 40, 80, 120, 180, 240 ppm pH 6.2, 6.8, 7.2, 7.8, 8.4, 9.0 Cyanuric Acid 0, 40, 100, 150, 250 ppm