Insta-Test 3 Plus Test Strips The Insta-TEST 3 Plus pool & spa strip measures Free Chlorine 0-10 ppm, Bromine 0-20 ppm, Total Alkalinity 0-240 ppm, and pH 6.2-9.0. This test strip is a dip-n-read strip with instant results. Each bottle includes 50 test strips packaged in a waterproof blue PopTop bottle with a hinged cap. The bottle has a molded desiccant liner, which protects the strips from moisture and UV light. The Insta-TEST 3 Plus strip is a perfect for basic water testing of the most important test factors. This product is available with English only text or trilingual (English, Spanish, French) instructions.