Hey Tredge Glad things are working in your favor

Quote Originally Posted by chem_geek
Mostly I'm asking just to get a sense of everyone's pool so I can see where the models start to break down.

Richard, my pool fyi-

21,200 gal IG vinyl, 3' to 8' depth.
Last time I tested fill water- PH 7.2, ALK 320.
Chlorinated with .75 gal of 6% bleach nightly. Salt approx 1200 ppm, no SWG.

I ran some tests when I was home for lunch.

TC/FC- 3.0
PH- 7.6
ALK- 170
CYA- 20ish

I was gone the past 3 days, and right before I left the PH was 8+. I added some muratic acid, and this is where things stabilized when I returned.

I highly suspect that with anymore splashing about (another kid fest), my PH will again shoot rapidly up. I always panic when it does because my test kit's upper range is 8.2, and I don't want it to get above that level but won't be able to tell if it does, so I knock it back down. What conditions would it take for my pool to go much higher than 8-8.2?