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Thread: pH and SLAM question

  1. Back To Top    #1

    Join Date
    Jul 2013
    Southern Delaware

    pH and SLAM question

    Almost done SLAMing the pool...before I started the SLAM pH was 7.3.

    I tested my pH today and it was at 8.2, FC was 28, CC 0...

    I realize that you cannot get an accurate reading with the test kits at such a high FC, but I work in a water laboratory and have some equipment that allows.

    My question is this. Should I add acid during the SLAM, getting it back down to approx. 7.5, or am I better off waiting until the SLAM is done?

    Will my pH lower as the FC decreases toward the target of 8, or will I have to help it out?

    Thanks... I look forward to your replies....
    13500 Gal. Above Ground. Vinyl. Hayward E-100 Highrate Sand Filter with Hayward Power Flow LX pump. Installed 2006.

  2. Back To Top    #2

    Join Date
    Feb 2008
    Flower Mound, TX

    Re: pH and SLAM question

    Until your FC is below 10, your pH reading cannot be trusted. Wait until it falls below 10 and test. Then you can adjust accordingly.
    10K gallon IG gunite with waterfall; Pentair CC320P filter; WhisperFlo 2 HP pump
    TF Test Kits - Pool Math - Pool School
    "It depends."- JohnT

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