Five-in-One Test Strips, These multi-parameter test strips test for five water quality measurements on 1 strip, Each

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These multi-parameter test strips test for five water quality measurements on 1 strip.Great for quick, on-site evaluations of water quality with reliable results on every test. These mulit-parameter test strips test for five water quality measurements on 1 strip. Contains 50 tests.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)