Hach 5 in 1 Water Quality Test Strips, Multi-Parameter Test Strips, Water Testing, Comprehensive Water Quality Analysis, Easy-to-Use Water Test Strips, 2755250

Free Chlorine (0-10 mg/L)Total Chlorine (0-10 mg/L)Total Hardness (as CaCO3, 0-25 gpg and 0-425 mg/L)Total Alkalinity (as CaCO3, 0-240 mg/L)pH (6.2 - 8.4)