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Thread: What causes TA to lower on its own

  1. Back To Top    #1

    Join Date
    May 2010
    Lehigh Valley, Pennsylvania

    What causes TA to lower on its own

    My TA has slowly lowered itself over the past few weeks. I boosted it up and overshot to about 130 last night. Just wondering if I should go ahead and lower with acid/aeration or let it lower itself as it previously did. What causes this natural lowering?

    25K gal vinyl inground, 1HP Hayward Pump, Hayward DE 4820 Filter

  2. Back To Top    #2
    Melt In The Sun's Avatar
    Join Date
    Oct 2009
    Tucson, AZ

    Re: What causes TA to lower on its own

    It goes down anytime an acid is added to the pool. If you use trichlor pucks, that'll do it.
    11,200 gal, Pebble-Tec; Tristar 2-speed 1hp - Swimclear 325 ft2 cart - SWG - A & A in-floor cleaner - Heat pump. For the poolside cooking, a Yoder Wichita and a Big Steel Keg!
    TF Test Kits -- PoolMath -- Pool School
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  3. Back To Top    #3

    Join Date
    Mar 2007
    San Rafael, CA USA

    Re: What causes TA to lower on its own

    Also dilution with water that is lower in TA, though that doesn't sound like the case in this situation.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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