TA effect on pH

[apoteker]

I have a 31500 gallon vinyl liner pool and it seems as if I have to constantly add acid daily to keep my pH at around 7.5. My TA has been running at between 80 and 90. Here are my test results from this evening:

FC 5.0
CC 0.5
pH 7.8
TA 80
CYA 35

Is 80 an acceptable TA for my pool or should I attempt to raise it? Also, is it normal to have to adjust pH on a daily basis? Thanks in advance for replies!

 

[JasonLion]

If your PH is constantly going up, you should let TA god down to 60. Higher TA levels mean more PH drift. Second, don't try to keep PH down at 7.5. Maintain PH closer to 7.7 to 7.8. Lower PH levels mean more PH drift.

 

[Richard320]

80 TA is fine.

Do you have hard water where you live? A lot of evaporation or splashout?

Daily acid seems extreme once the TA gets down to double digits, unless you're constantly adding more TA via refills.

 

[apoteker]

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No, my CA was 60 during my last test and I only have to add water about once per week. So I should let my pH stay higher than 7.5? I've tried to keep it around the middle of the suggested target levels.

 

[JohnT]

Do you have a SWCG?

 

[apoteker]

No SWG. I just add 12.5% liquid chlorine as needed.

Do you have a SWCG?