Test your pH when your chlorine is low and you're more likely to get a more accurate result. (When your chlorine is below 5ppm or with a Taylor K-2006, when it is below 15ppm.)
Re: Pool Nub
Test your pH when your chlorine is low and you're more likely to get a more accurate result. (When your chlorine is below 5ppm or with a Taylor K-2006, when it is below 15ppm.)
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