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Thread: FC relationship to PH

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    FC relationship to PH

    I recently increased my FC level from 3ish to 5 or 6 due to warmer weather (more FC loss) and storms we've been getting. My PH b4 the increase was normally 7.3 to 7.4, now its 7.2. Could the drop be a result of increased FC level or from rain water addition?

    FC = 5 to 6
    PH = 7.2
    TA = 120
    CYA = 30, though I'm working to increase to 40, just added some stabilizer
    Intex 16x48 Ultra Frame
    5100 gallons
    Intex Sand Filter and Pump
    BBB Bliss Baby!

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    Join Date
    Jul 2009
    Location
    Olney, MD
    Posts
    218

    Re: FC relationship to PH

    The PH is probably just dropping because your stabilizer is dissolving. If you are using trichlor or dichlor to increase your FC, either one would also drop your PH.
    20k gal, IG Vinyl, IntelliFlo VF Pump, 60 GPM sand filter, Jandy Aquapure Ei 35, 2 skimmers, one main drain, two returns, Dolphin Diagnostic cleaning robot, Taylor K-2006 test kit

  3. Back To Top    #3

    Re: FC relationship to PH

    BBB all the way, should I wait for the stabilizer to disolve b4 adjusting ph or will ph come back up?
    Intex 16x48 Ultra Frame
    5100 gallons
    Intex Sand Filter and Pump
    BBB Bliss Baby!

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    Join Date
    Feb 2008
    Location
    Denton, TX
    Posts
    5,061

    Re: FC relationship to PH

    It's likely due to your recent addition of CYA.

    7.2 is still fine. Some swimming and splashing should help it. If you see the pH go lower, you can consider some aeration. Typically, with bleach as your chlorine source, the pH will rise in time, as long as you steer clear of stabilized sources of chlorine.

  5. Back To Top    #5

    Re: FC relationship to PH

    Adding CYA and my Ph dropping should have registered with me
    Intex 16x48 Ultra Frame
    5100 gallons
    Intex Sand Filter and Pump
    BBB Bliss Baby!

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