Our Gunite pool was finished in November 2020. It’s 26,000 gallons. Salt water system. Since it was finished my pH always tends to rise. About every two or three days the pH will get up to around 8.0 that’s as high of reading as I can get with my test kit. And I put in about half a gallon of muriatic acid and it drops it to about 7.3. I thought that the cycle would stop after about a year from what I had read. Really struggling with why the cycle continues. Does a salt system result in a rising pH? Is calcium somehow leaking out of the cement in plaster which I can imagine is a good thing? Any help would be greatly appreciated
pH rising in gunite pool after 1.5 years
- Thread starter dphanes
- Start date
- Jun 24, 2021
- 7,519
- Pool Size
- 30000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-60
TA is 90-100. About every week and a half have to put in a bag of baking soda as the TA gets down to 60 or 70. All the other readings look good calcium hardness is about 350, iron and copper both negligible chlorine generally runs three or so
- Jun 24, 2021
- 7,519
- Pool Size
- 30000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-60
You can let your TA go as low as 50. Why don't you manage pH for now to get TA down. Try to just keep it above 50 for a while. Lower TA levels will help reduce pH rise. Also, let your pH rise to 7.8 or 8.0. You might even let it go to 8.2. Let's let the TA go down and sit 50-60 and your pH sit at 7.8, 8.0 to 8.2. My guess is that you will find an equilibrium in there somewhere that will slow pH rise.
Deeper reading if you are interested:
www.troublefreepool.com
Deeper reading if you are interested:
PH TA Relationship - Further Reading
www.troublefreepool.com
- Jun 8, 2019
- 4,576
- Pool Size
- 20000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
- Jun 8, 2019
- 4,576
- Pool Size
- 20000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
Perfect, then your TA is fine down to 50 or so. Tabs are acidic and you want more TA for that reason if you use them, but salt cells are pH neutral, so lower TA is fine.
Thanks for help. T will get TA to 60 or so and see if pH stabilizes