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Thread: Can't raise pH and TA

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    Can't raise pH and TA

    Hi all - I hope you guys can help me to understand the following:

    Nothing wrong with my pool, aside when I check pH and TA, they seem to be way too low.

    pH
    I'm using a HDX testkit and it shows a very bright yellow, way below 6.8. Raising it with sodium carbonate did not work at all. No change, even after using twice the required amount. The pH does not bounce, it is stable.

    TA
    So I had a look at TA. After adding the chemicals to the testkit, I get a bright yellow, so I assumed this means no alkalinity, as that's the final color during the TA test. I tried to raise it using sodium bicarbonate. But after adding 5 pounds on one weekend and 7 on the next - still the same result. I switched the pump off for 4-5 hours after adding it.

    I verified my test results with a different brand test kit from a colleague.
    I am using Max Blue tablets for chlorination. They come with a water softener and stabilizer.

    Regards, Mike
    25'000 / IG / Vinyl / Sand

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    Mod Squad pooldv's Avatar
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    Re: Can't raise pH and TA

    Welcome to TFP!

    The pucks have crashed your TA and PH. Your pH could be as low as 4 or 5. Enter all your test results in PoolMath, link above. Enter 6.8 for Now and 7.5 for Target. Add the recommended amount of Borax or soda ash as shown here. Pump running, brush and retest in 15 minutes. Repeat as many times as needed until the PH shows up on the test.
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    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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    Re: Can't raise pH and TA

    Hi pooldv

    Thanks for the quick answer. Given the amount of new posts here every day, that's not to be expected. Much appreciated.

    You were right, I just needed to continue with soda ash. I did not expect that it needs close to 40 pounds of it, it just seemed too much. My pH is now at 7.2 but TA raised to 150 as well, so I will aerate instead of adding more soda ash.

    Regards, Mike
    25'000 / IG / Vinyl / Sand

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    Mod Squad pooldv's Avatar
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    Re: Can't raise pH and TA

    Excellent plan.
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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