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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
    Denton, 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.

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