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Thread: Dry acid and SWG???

  1. Back To Top    #1

    Join Date
    Aug 2011
    Mechanicsburg, PA

    Dry acid and SWG???

    Noticed a little cloudness in the water and did my own test and also went to the pool store
    PH - 8.1
    FC - 2.89
    TC - 2.95
    CH - 145
    TA - 135
    CYA - 45

    Pool guys suggested to drop 2.5lb to lower ph/ta. I did.
    Now I am reading that dry acid should NOT be used with SWG. Can somebody confirm .
    IG double roman vinyl 40x20. 35000 gal. 9' deep. Diving board.Pentair 400HD gas heater, ItelliFlow Variable Flow pump, 520 cartridge filter, two pentair G5 lights, IC60 SWG cell.
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  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Dry acid and SWG???

    Using a little dry acid here and there is fine. Using dry acid every time you want to lower the PH for years can cause damage to the SWG eventually.

    By the by, the recommended CYA level for a SWG is from 70 to 80.
    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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