High ph

BIG R

Member
Apr 22, 2025
13
Oro Valley Az
Pool Size
16000
Surface
Plaster
Chlorine
Liquid Chlorine
Why does the ph climb from 7.2 to 8.0 in a week. I add muriatic acid to decrease to 7.2 and in a week or so it's right back up to 8.0. TA is 110 ppm. 15000 gallon in ground pebble tech in Tucson Az
 
With your high TA fill water you will need to add acid twice a week during high evaporation periods. Very typical.
 
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When your TA gets to 60-80, if you get there, stop forcing pH down to 7.2. It should be fairly stable around 7.8-8, which is fine.

You may not be able to get there with high evap rate and high TA…just letting you know if you do get TA down.
 
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