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Thread: Dealing with high pH

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    Dealing with high pH

    My pH goes from 7.6 to 7.8 in about 3 days, then on up to 8.0 (if I would let it). I add 40 oz. of muratic acid to return it to 7.6 from 7.8 (30,000 gallon pool).
    FC = 4.5 (Hayward SWG)
    CC = 0
    CYA = 50
    TA = 90
    CH = 30
    pH = 7.8

    Is it normal for this to happen in the summer? Its already 90 F here in Mississippi, with high humidity. I get about 2" of evaporation per week. I know the CH is extremely low, but I have a vinyl liner, and our water here is extremely soft. Is there anything to do to keep from having to add so much acid? The pH lowers as calculated when I add the amount of acid indicated by the Taylor test.
    30k gallons in-ground vinyl
    1.5 hp pump 300 lb sand filter
    Polaris cleaner, T15 Hayward SWG
    Jackson, Mississippi

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    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: Dealing with high pH

    Pretty normal, especially with a SWG that is causing aeration which drives the pH up.
    You could raise the CYA up to recommended levels and reduce the SWG output which should result in less aeration and slow the pH rise.

    As you keep the pH in check, the TA should also get lowered which should also slow the pH rise.
    Jason, TFP Moderator
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    Mod Squad Patrick_B's Avatar
    Join Date
    Jun 2011

    Re: Dealing with high pH

    Yes, very normal I agree.

    Once the TA is down a little it will slack up on rise. Still, there is nothing unusual with that at all.
    TFP Moderator
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    Join Date
    May 2014
    Georgetown, ON, Canada

    Re: Dealing with high pH

    I have found the same thing with my swcg so I did the borax treatment to buffer the pH, in addition to the other benefits it brings
    32,000L Fibreglass Leisure Pools IG 12.5'x23'x5' Pump: AstralPools BX1 1.0HP
    Filter: AstralPools ZX-310 SWCG: AstralPools VX7T
    Heater: Hayward H250FDN Test Kit: TF-100

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