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Thread: High TA and pH adjustments

  1. Back To Top    #1

    Join Date
    Aug 2010
    Champaign, IL Area

    High TA and pH adjustments

    After our first week of new pool ownership, all seems to be going well but I do have some questions about TA and pH.

    My TA is high at around 350...I got distracted during my test last night and ended at 370 but I think it may have been a "drop" or two lower--I'm doing the "adjusted" test for high TA using only 10ml of pool water.

    My pH as of last night was at 7.8 (I added the appropriate amount of dry acid to bring it down to 7.5). It has been 3 days since I previously added dry acid...I had a creep from 7.5 to 7.8 over those 3 days.

    So my question, we're probably going to close our pool end-October/early-November, is it even worth it to try to tackle my TA levels at this point in the season?

    One thing I'll note is that we have a 2hp pump for an only 21' round pool (silly but they were out of smaller pumps for the season and we bought our pool on a end of season deal and wanted to get it installed this year so we can get our landscaping done before winter), so we're getting some water breakage from the return jet...I'm wondering if this will help my TA at all...I guess only time and testing will tell on that one.

    One other question. I'm currently using a pH reducer (dry acid)--3 lbs came with our pool kit. Any reason not to use this until it's gone and then switch to muriatic acid?
    21' round 54" AG Wilbar Quest; ~11,000 gal//Hayward Easy-Clear 125 sq ft Cartridge filter//Hayward Power-Flo LX 2hp pump

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    duraleigh's Avatar
    Join Date
    Apr 2007
    Sebring, Florida

    Re: High TA and pH adjustments

    The dry acid is fine....use it up.

    I doubt you'll get much help with your TA if you keep your pH up where it is. If you carefully lower it to around 7.0, then aerate with your big pump, you'll see TA drop pretty quickly (until you get pH up around 7.4 or so, then you have to start over again.

    Whether you can move TA much or not, I think I would encourage you to ignore it fro the rest of the season. Read the "Lowering TA" article in Pool School and it'll give you a good idea how the process works.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  3. Back To Top    #3
    dmanb2b's Avatar
    Join Date
    Apr 2009

    Re: High TA and pH adjustments

    What Dave said Gosh a 2hp pump ....way overpowered , but like Dave mentions...just point your returns upward when you decide to aerate.
    24'x52" AGP (13,500 Gallons), Intex SWG, (2)Solar Bear 4x20 panels, Hayward S220T Filter, 1/2hp Pentair Superflo

    Pool School, TFTestKits, Pool Calculator

  4. Back To Top    #4
    Mod Squad JohnT's Avatar
    Join Date
    Apr 2007
    SW Indiana

    Re: High TA and pH adjustments

    What Dave said, plus make sure you take advantage of rainwater over the winter to dilute your high TA water with 0ppm TA rainwater. It's the easiest way to lower it.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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