Hach 2745250 Total Hardness Test Strips, 0 – 425 mg/L are easy to use, disposable, and inexpensive. They are a great way to obtain quick, quantitative answers in the field or in the lab.
These strips measure total hardness as CaCO3
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Steps: 0, 25, 50, 120, 250, 425 ppm
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Each jar contains 50 tests.





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