5-in-1 Water Quality Test Strips - Thomas Sci
5-in-1 test strips are 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: Free Chlorine (0-10 mg/L) Total Chlorine (0-10 mg/L) Total Hardness (as CaCO 3, 0-25 gpg and 0-425 mg/L) Total Alkalinity (as CaCO 3, 0-240 mg/L)
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