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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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Testing Free Chlorine and Chlorine Residual
add five drops

Add five drops of a chlorine indicator

Photo © Lisa Hallett Taylor
Add five drops of solution No. 1, which, in this kit, is ortho-Tolidin, a chlorine indicator.

Next: Cap the Vials

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How to Test Pool Water

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