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Thread: PH rise due to SWG?

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    Join Date
    May 2012
    Location
    Boyd, Texas
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    93

    PH rise due to SWG?

    I keep hearing that SWG will cause Ph to drift up over time. How fast is "over time"? I know it depends on borates (assume 0) and TA (currently 113), I also know it varies with every pool but are we talking .5ph a week or more or less...
    6500 gal, Intex 18'x48" above ground, 1hp Pro Sand Filter, TF100 Test Kit

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    JasonLion's Avatar
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    May 2007
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    Silver Spring, MD
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    Re: PH rise due to SWG?

    That depends on several factors. In extreme cases PH can drift out of range in hours, other times days, when things are adjusted correctly weeks to months. High TA tends to cause the PH to drift more quickly. Lots of aeration also causes the PH to drift more quickly. You can stop, or at least greatly reduce, PH drift if you follow our recommended TA levels.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Join Date
    May 2012
    Location
    Boyd, Texas
    Posts
    93

    Re: PH rise due to SWG?

    Yeah I plan on following recommended level. Speaking of, pool calculator says adding CYA will drop PH, will this also drop the TA level?
    6500 gal, Intex 18'x48" above ground, 1hp Pro Sand Filter, TF100 Test Kit

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    JasonLion's Avatar
    Join Date
    May 2007
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    Silver Spring, MD
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    Re: PH rise due to SWG?

    Yes, but not enough for you to notice or be useful.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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