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Thread: borax before or after AA stain elimination

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    borax before or after AA stain elimination

    Battled the brown stains with AA, looked wonderful, used a metal sequistering agent and all was good for about 5 days, right until the green alge started.
    Had to shock to get alge under control. water is now balanced, Should I AA again or add borax/acid first then drop cl levels to add the AA?

    23000 gallon fiberglass pool/ ugly brown stain all around
    SWG ,aqua rite

    cl 5.5
    TA 80
    ph 7.57
    cya 60
    23000 gallon fiberglass pool
    hayward pro II sand filter with 1 1/2 hp motor and pump
    SWG aqua pro, dolphin diagnostics advantage robot

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    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: borax before or after AA stain elimination

    Adding borax and acid can cause large swings in the PH, which can cause stains to appear. Thus, it is best to add borax/acid before doing an AA treatment. Give it three days after adding borax before starting the AA treatment.
    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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