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Thread: Causes for raising TA

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    Join Date
    Oct 2007
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    Valrico, FL
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    Causes for raising TA

    The TA in my pool raises slowly over time. The pool is about four years old, and I do not add baking soda. About once a year I have to perform the TA reduction process. I would like to know possible causes of increasing TA.
    7,500 gal, IG pool, L shape 22' x 15', 1.5 hp pump, cartridge filter, AquaPlus SWG/Controller, Pebble-Tec liner.

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    Melt In The Sun's Avatar
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    Re: Causes for raising TA

    It's probably from your fill water. What is the TA out of the tap?
    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!
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    Re: Causes for raising TA

    Mine rises due to the fill water is higher in TA than what I keep it at. What level do you keep your TA at and what level is your fill water? You may as well post all the test results; FC, pH, TA, CH, CYA.
    16k gal plaster with raised spa, Jandy DEV60 filter, 2 HP 2-speed SHPF Jandy Stealth pump
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    Re: Causes for raising TA

    Remember that with evaporation and refill, whatever is in the fill water gets added to the pool. So even smaller amounts of TA or CH in fill water will increase those values in the pool. It's with drain/refill where only higher values in fill water increase values in the pool.
    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
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    Join Date
    Oct 2007
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    Valrico, FL
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    Re: Causes for raising TA

    I will have to get back to you on the fill water measurements.

    As for the pool, I try to keep pH at 7.6, FC at or greater than 5, TA was reduced to 50, CH is at 280 and CYA is at 70.

    During the summer months, I do not fill the pool, rather usuallt have to drain some from the summer rains. Even during this period TA raises.
    7,500 gal, IG pool, L shape 22' x 15', 1.5 hp pump, cartridge filter, AquaPlus SWG/Controller, Pebble-Tec liner.

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