Hach 2755250 5 in 1 Water Quality Test Strips are great for quick, on-site evaluations of water quality with reliable results on every test. These multi-parameter test strips test for five water quality measurements on each strip. Each jar contains 50 test strips.
Free Chlorine (0-10 mg/L)
Total Chlorine (0-10 mg/L)
Total Hardness (as CaCO3, 0-25 gpg and 0-425 mg/L)