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!
Pack of 5, Total of 250 Strips!