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Thread: pH Question

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    Join Date
    Jun 2014
    Location
    Sterling Heights, MI
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    13

    Question pH Question

    Our pool has had a steady pH of 7.5 all week. The kids were away during the week and the pool did not get used. They returned on Sunday and headed straight for the pool. When I tested pH today it is up to 7.8. Is it possible that swimming and splashing would cause this number to go up?
    7600 gallon AG with a Waterway Premium Blue (150 sqft) Cartridge Filter, Waterway 1/2 hp 2 speed pump. Installed on 6/25/14. Raypak 156 Heater. TF-100 Test Kit

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    Smykowski's Avatar
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    Sep 2011
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    Gurnee, IL (North Suburban Chi-town)
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    3,065

    Re: pH Question

    That is the most likely explanation. A high TA will cause pH to naturally drift upward as well.
    33' round, 23,000 gal AG vinyl , 1HP 2spd PowerFlo Matrix downsized with 3/4HP impeller (X2), Hayward S180T 150# sand filter (X2), Hayward H250 NG heater Pool Store year 1 - $850 for 2 months; Pool Store year 2 - $440 for 2 months, TFPC year 1 - $170 for 4 months; TFPC year 2 - $95 for 4.5 months
    The most important article on this site - The ABCs of Pool Water Chemistry

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    Join Date
    Jun 2014
    Location
    Sterling Heights, MI
    Posts
    13

    Re: pH Question

    TA has been decreasing. On 7/4 it was 140, 7/8 was 120, and 7/12 was 110. Should I add something to adjust the TA or just let it come down on it's own?
    7600 gallon AG with a Waterway Premium Blue (150 sqft) Cartridge Filter, Waterway 1/2 hp 2 speed pump. Installed on 6/25/14. Raypak 156 Heater. TF-100 Test Kit

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    JasonLion's Avatar
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    May 2007
    Location
    Silver Spring, MD
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    37,879

    Re: pH Question

    Just lower the PH to 7.2 each time it gets to 7.8 until the TA is in the normal range and all should be fine.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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