Very accurate everytime I go into a pool store to have my water tested it says the same things my strips tell me
The Insta-TEST 5 Plus pool & spa strip measures
- Free Chlorine 0-10 ppm
- Bromine 0-20 ppm
- Total Chlorine 0-10 ppm
- Total Alkalinity 0-240 ppm
- pH 6.2-9.0
- Total Hardness 0-800 ppm
This test strip is a dip-n-read strip with instant results. Each bottle includes 50 test strips packaged in a waterproof PopTop bottle with hinged cap. The Insta-TEST 5 Plus is also packaged with the Insta-TEST Pool & Spa Owner's Handbook.
The bottle has a molded desiccant liner, which protects the strips from moisture and UV light.