Features The Insta-Test POOL 4 Plus pool &spa strip measures Free Chlorine 0-10 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 The test strips are packaged in a waterproof Pop Top bottle with a molded desiccant liner, which protects the strips from moisture and UV light.
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