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Thread: High pH and TA

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    High pH and TA

    I can't seem to keep my pH at a manageable level without using tons of MA. I get it down to 7.2-7.6 and it jumps back up. I am currently at 8.2. Ideas?
    2003 Coleman MAAX Collection Model 706 - 400gal

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    Re: High pH

    BTW... my TA is 160.. perhaps that is the culprit?
    2003 Coleman MAAX Collection Model 706 - 400gal

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    Re: High pH

    Talking to myself here... :P

    My TA was 200 in April.. I have added 6gal on MA since then.. shoudn't my TA now be closer to 80?

    6gal = 24 qts * 5 TA I shoud be losing per qt = 120approx 200-120 = 80
    2003 Coleman MAAX Collection Model 706 - 400gal

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    Join Date
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    Re: High pH and TA

    Have you added any water since April? My TA was going up over the summer, which befuddled me until the doh! moment of remembering my fill water has TA 150.
    --paulr
    BBB "Intermediate Swimmer"
    IG plaster pool 18.5K gal, Hayward Pro-Grid DE filter, 3/4 HP Hydramax II; Polaris 380, 3/4 HP booster
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    Re: High pH and TA

    Yea.. I add 3-5" every 7-10 days. I have not tested the TA on my fill water.
    2003 Coleman MAAX Collection Model 706 - 400gal

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    JasonLion's Avatar
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    May 2007
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    Re: High pH and TA

    Yes, your PH is going up because of your high TA.

    You should test the TA (and CH) level of your fill water. That is probably where your high TA comes from in the first place.'

    Lowering TA down to around 80 would dramatically reduce the rate of PH increase.
    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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    Re: High pH and TA

    Thanks... how much MA can I safely add at one time?
    2003 Coleman MAAX Collection Model 706 - 400gal

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    frustratedpoolmom's Avatar
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    May 2007
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    Re: High pH and TA

    You only add enough acid at one time to lower the PH down to 7.2. You don't want to go lower than 7.0, regardless of the TA level.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
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