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Thread: Keeping Pool PH in the low 7's

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    Keeping Pool PH in the low 7's

    The Taylor PH test does not measure PH below 7. I want to keep my pool PH between 7 and 7.2. I'm testing if this PH level keeps my grey mottling issues in check, so far so good.

    When the Taylor test result indicates my pool PH is 7 I'm concerned that my PH might be below 7. Because 7 is the lowest result in the range, can I be confident my pool PH is actually 7 or would PH in the high 6's (6.6 to 6.9) have the same color result as a PH of 7? Having a pool heater, I'm pushing the envelope keeping my PH low, just don't want it to go below 7, but have no way to confirm?

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    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Keeping Pool PH in the low 7's

    The color continues to change down to 6.8. There isn't any color reference on the view tube, but the color at 6.8 is detectably different than it is at 7.0.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: Keeping Pool PH in the low 7's

    That makes me feel a whole lot better - thanks for your help!

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