Liquid chlorine PH question

[WS-money pit]

I am wondering what the PH value is for 12.5% liquid chlorine.
My pool is stuck at 7.8, added muriatic acid to bring it down to 7.4, but it keeps creeping back up consistently.
I'm adding approx. 1/2 gal of LC each morning.

 

[Lake Placid]

PH is around 12 but this is not causing your rise. What’s your TA? Any features that you run that aerate the water, or returns that cause surface disruption/aeration?

 

[WS-money pit]

TA is steady at 80, some returns cause turbulence as the water level drops.
Should I make sure that they are pointing below the water surface?

 

[Lake Placid]

TA is steady at 80, some returns cause turbulence as the water level drops.
Should I make sure that they are pointing below the water surface?

Yes turn them down to reduce or eliminate surface action on the water, this can contribute to ph rise. Reducing TA will help slow ph rise.

Lower Total Alkalinity

A lower Total Alkalinity level can help a pool owner stabalize their pH increase. We'll explain how to lower TA with a little help from muriatic acid.

www.troublefreepool.com

 

[IceShadow]

LC will cause some pH rise but it is temporary. Once the LC does its thing and kills algae (or is used up by the sun) it causes pH to drop a bit, which offsets the pH rise from adding the LC.

Creeping up is from TA and offgassing. Reducing aeration will help. You can let your TA come down to about 50 as the acid is added too - I wouldn't go lower, but it can get down there and that will slow pH rise too.