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Thread: Low TA, PH still goes up

  1. Back To Top    #1

    Join Date
    Oct 2007
    Location
    Jacksonville, FL
    Posts
    22

    Low TA, PH still goes up

    I have my TA at 60 but my Ph still goes up about .1 each day. I use about 3/4 of a gallon of MA a week. Is there any harm if I try to lower the TA down to 50 or even 40?
    21K - marcite - inground - Autopilot 48 SWG - 240 sq ft Pentair filter - 2hp 2sp Pentair pump - solar heater

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,887

    Re: Low TA, PH still goes up

    Welcome to TFP!

    You can lower TA down to about 50, but I wouldn't go any lower than that. Very low TA levels allow the PH to shift too much when you are adding chemicals.

    Was your pool built recently? Plaster pools will raise the PH for up to a year after they are built as the plaster cures.
    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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