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How to Use a Pool Test Kit: The Right Way to Check a Pool's Water Quality

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Color Comparison
compare colors

Compare colors for chlorine residual level

Photo © Lisa Hallett Taylor
Wait a few seconds to compare the color in the vial with the color standards indicated on the plastic tester to determine the free chlorine level. After that, wait a couple minutes and compare again to determine the chlorine residual level.

Next: Testing the Pool's pH Levels

Related Video
How to Test Pool Water

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