SLAM and Very High pH/TA

[steve_h]

I am preparing SLAM the pool once water level is correct, debris removed, Skimmer face plates replaced, etc.
The pool took a bunch of well water this year.
The well water is:
pH >8.2
TA > 400ppm
CH ~ 20ppm
My plan is to clean pool, raise CYA to ~40ppm for the SLAM.
Problem is I KNOW pH and TA are off the chart because of the amount of well water. (I have not tested yet and reasonable to believe the pool levels are close to the well water)
I can reduce pH to the SLAM recommended 7.2-7.5 with muriatic acid. However, with the very high TA, the pH will quickly bounce back to >8.2ish.

Should I reduce the TA to the TFP recommended 60-90 ppm BEFORE SLAM and therefore have a more reasonable and stable pH? or​

Is it possible to SLAM while struggling with TA & pH knowing that the pH is unreliable during SLAM?​

I reviewed the forum and could not find a clear answer.

Will post pool chem levels later today it I get around to taking them.

Thanks,
Steve

 

[Texas Splash]

Just adjust the pH for now. You can adjust the TA after the SLAM.

 

[steve_h]

Thanks...
Maybe that info could be added to the SLAM article.
Test results:
FC - 0.5
CC - 0.0
pH - 8.4
TA - 380
CYA - 15 or less
Salt - Will find when I turn the system on. But 320 lbs in waiting.

 

[hwy17]

I'm not sure about raising CYA before SLAM. I always did it the other way around cause it takes less chlorine to get to SLAM before adding CYA.

 

[mknauss]

Check and adjust the PH to between 7.2 and 7.5.
SLAMing an outdoor pool is most effective when CYA is around 30 to 40. Below 30 you lose too much chlorine to sunlight.

Both statements from the SLAM Process

Read it.