pH not rising with aeration

[Mdragger88]

Also note, that the ta reduction won’t necessarily be linear as you have calculated. As the ta falls each ph reduction will likely have a greater effect on it each time.
Its ok & can be helpful to lower your ta if you’re trying to help reduce ph rise frequency but that is really the only reason you should consider it in your case. It is also not super necessary to do. As you manage your ph normally the ta will fall over time anyway & find it’s happy place.

 

[P00LNerd]

That makes a lot of sense. Thanks!

Rough math suggests the ~3500 gallons of municpal fill water I have delivered each spring to top off the pool must have TA near 175 ppm. My last reading in October was 90 ppm, and the pool reading skipped up to 110 ppm after this spring's top-off, which is only 23% of the total pool volume.