I have very high TA and can't seem to knock it down. Here's some background.
This is year 3 with our pool, but its 10 years old - we moved in late summer of 2019, so just the 2nd year of opening and full season. The previous owners had a Hayward SWG installed, but they turned it off a couple years ago. I had a new cell installed and turned it back on for use this year (there was already enough salt in the water from previous use)... just including that background in case it matters.
I noticed the alkalinity was high late last season, after noticing high pH that kept drifting. We were more or less done for the year, so I didn't do anything about it and figured I'd address it after I opened it this year. We opened the pool about a week ago, and its in great shape... other than pH and TA. The pH was >8.0 a few days after we opened it and TA was 225. I used the pool math calculator and added muriatic acid to drop the pH to 7.0. We have a slide that I figured would aerate the water and expected some rain (it didn't come). A couple days later, pH was back up to 7.6 and TA was 200. I added more muriatic acid to drop pH to 7.0. Today, pH is 7.4 and TA is still 225. I'm wondering if I'm not aerating enough? I'd appreciate any advice. Here are the other numbers:
40,000 gallon pool
FC = 17 (I know that's high. They put 8 gallons of liquid chlorine in when they opened the pool last week - its been very cool here and I had the SWG running... I turned it off this morning until the FC drops)
CC = <0.5
pH = 7.4
TA = 225
I forgot to write down the CYA but it was somewhere around 80.
This is year 3 with our pool, but its 10 years old - we moved in late summer of 2019, so just the 2nd year of opening and full season. The previous owners had a Hayward SWG installed, but they turned it off a couple years ago. I had a new cell installed and turned it back on for use this year (there was already enough salt in the water from previous use)... just including that background in case it matters.
I noticed the alkalinity was high late last season, after noticing high pH that kept drifting. We were more or less done for the year, so I didn't do anything about it and figured I'd address it after I opened it this year. We opened the pool about a week ago, and its in great shape... other than pH and TA. The pH was >8.0 a few days after we opened it and TA was 225. I used the pool math calculator and added muriatic acid to drop the pH to 7.0. We have a slide that I figured would aerate the water and expected some rain (it didn't come). A couple days later, pH was back up to 7.6 and TA was 200. I added more muriatic acid to drop pH to 7.0. Today, pH is 7.4 and TA is still 225. I'm wondering if I'm not aerating enough? I'd appreciate any advice. Here are the other numbers:
40,000 gallon pool
FC = 17 (I know that's high. They put 8 gallons of liquid chlorine in when they opened the pool last week - its been very cool here and I had the SWG running... I turned it off this morning until the FC drops)
CC = <0.5
pH = 7.4
TA = 225
I forgot to write down the CYA but it was somewhere around 80.