Hach Test Strips | Hach
2019-12-21 · With the 3 pads fully submerged, stir the recovered water sample for 10 seconds with the test strip. 5. Remove the test strip. 6. Dab the side of the test strip on an absorbent surface (e.g. paper towel) to absorb excess moisture. 7. After 90 seconds, compare the colors on the test strip to the color indicator chart provided on the test strip bottle. 8.
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