We have a 15,000 gallon plaster pool built in October 2019. We already had to dump the water and wash/repolish the plaster due to calcification. Now after refill the PH/TA keep creeping up. We had it well balanced for a few days - LSI at .00 to .016 (PH 7.4, TA 120PPM) then next day PH went up to almost 8 and TA 150 PPM. This is not the first time it happens and we are having a hard time to keep it stable. Some additional information: Hardness 280-290 PPM, very low levels of chlorine as we have an Ozone/UV light system.
Any insights on why the PH keeps getting out of control?
PH/TA keeps creeping up
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rafaelbasso
- I'm new here
- Posts: 1
- Joined: Sat 09 May, 2020 09:06
- My Pool: 15,000 gallon pool, plaster, using ozone/UV light plus chlorine, it has a continuous pump, cartridge filter and a heater, plus automatic cover.
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Denniswiseman
- Pool Industry Leader
- Posts: 2594
- Joined: Tue 06 Sep, 2011 05:48
- My Pool: 10k inground fibreglass, Telescopic Cover, Hayward Powerline pump, Quality filter with glass media, 27kw output heat pump, K-2006C test kit
- Location: United Kingdom
Re: PH/TA keeps creeping up
Use acid to bring your pH down to 7.2 (this will also bring your TA down as well)
Aerate to bring pH up to about 8 then repeat untill TA is where you want it and pH is about 7.4
Aerate to bring pH up to about 8 then repeat untill TA is where you want it and pH is about 7.4
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