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    Issue when testing chlorine with FAS-DPD kit.

    Hello, We purchased the 2006 FAS-DPD test kit to more thoroughly test the pool water. However in comparison to the OTO test or results from Pinch-a-Penny the chlorine test always comes out to about twice as high. Meaning currently Pinch-a-Penny says the total chlorine is at 4ppm. The OTO test...
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