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Thread: Testing ph after slamming

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    Join Date
    Jul 2014
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    Yucaipa, CA
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    Testing ph after slamming

    I noticed that the ph test may be out of whack when slamming your pool. When can you get a reliable reading? When it is back within the recommended levels or sooner?
    11,400 Gallons, IG Vinyl, Pentair 188592 Quad D.E. Cartridge Style D.E. Pool Filter 60 Square Foot 120 GPM, Pentair 011018 IntelliFlo Variable Speed High Performance Pool Pump 3 Horsepower 230 Volt, 1 Phase Energy Star Certified, replaced liner 8/2011, TF-100 Test Kit.
    ~Kellie

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    Join Date
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    East TN
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    Re: Testing ph after slamming

    When your FC level gets to 10ppm or lower then you should get a reliable reading. It could take a few days after your done slamming. It just depends on the water temperature and sunshine.
    18,000 Gallon Aboveground. Sand Filter with 2HP 2 speed Pump.

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    pwrstrk's Avatar
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    Re: Testing ph after slamming

    I would let the FC drop below 10 to ensure an accurate PH test. At FC levels of 10 and above the PH test can read a false high. 😎
    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

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    Patrick_B's Avatar
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    Re: Testing ph after slamming

    The best thing to do is adjust your pH first before SLAM.

    You cannot depend on the pH reading with high FC during the process as it interferes with the pH test.
    TFP Moderator
    Essential Links:
    ABC's Of Pool Chemistry, Test Kits, SLAM Your Pool
    28K Gal IG FreeForm, CLI Quartz, Pentair 36"SF & VS Pump, Dolphin M5, Rheem

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    Join Date
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    Yucaipa, CA
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    Re: Testing ph after slamming

    Thank you everyone !
    11,400 Gallons, IG Vinyl, Pentair 188592 Quad D.E. Cartridge Style D.E. Pool Filter 60 Square Foot 120 GPM, Pentair 011018 IntelliFlo Variable Speed High Performance Pool Pump 3 Horsepower 230 Volt, 1 Phase Energy Star Certified, replaced liner 8/2011, TF-100 Test Kit.
    ~Kellie

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    BoDarville's Avatar
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    Jun 2012
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    Re: Testing ph after slamming

    KASCPAMBA:

    You have been given some great advice by some of our finest on the nuances of testing pH.

    BTW, I recognized your user-name and remember helping you get your pool in shape from a very high CYA this past summer. Hopefully all is going well.
    Gold Supporter, TFP Lifetime Supporter, 26,680 gal Plaster IGP 3.5 - 10' depth / Attached Waterfall Spa, Manually Chlorinated, Triton Sand Filter, 1.5 HP * 1.1 SF = 1.65 SFHP 1-speed Pentair WhisperFlo WF-26 Pump, 400K BTU NG Teledyne Laars Series One Heater, Polaris 360, Test Kit Comparison, Chlorine/CYA Chart, SLAMing Your Pool, OCLT
    A good test kit is an investment, not an expense.

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