5 in 1 Water Quality Test Strips | Hach USA - Overview
2021-2-5 · The 4-in-1 strip tests for pH, total alkalinity, total chlorine, and total hardness. Dip and swirl the strip in water for 5 seconds, then wait 20 seconds. You're supposed to complete the color matching in 10 seconds, so you've gotta be fast! There are two other water test …
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