Free Chlorine, Bromine, Alkalinity, pH, Total Hardness
- The Insta-TEST® 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 Total Hardness 0-800 ppm.
- The bottle has a molded desiccant liner, which protects the strips from moisture and UV light.
- 3029-plus Great for Spas!
- The Insta-TEST® 4 Plus strip is ideal for spa owners who need the most critical tests for perfect water balance.