First, let me say - this website has been a great source of information to us this summer and our pool has been the better for it. Thank you!
Second, let me admit that I am NOT a pool expert and am still learning MUCH about pool chemistry. We did many things differently this summer based on your Pool School; however, we were not able to follow all your recommendations (such as emptying 40% of our volume to adjust CYA). My husband stood firm on that. So, we used A LOT of bleach and back-washed the filter frequently!
Third, we ARE following your guidelines for pool closing, including draining our pool to within 4" below the returns. Trust me when I say this is a HUGE step for my husband (who was advised NOT to EVER drain the pool on account that the sides would collapse due to ground pressure). After reading many posts here from those with similarly constructed pools in similar climates, as well as research on other websites - my hubby is willing to try it this year. Thus, that should help our CYA for next season.
Here are my questions:
Yesterday, I shocked the pool and used more chlorine than the PoolCalculator recommended (because it's taken more than what the calculator recommended to get to the proper levels all season). So, I added an extra jug choosing to err on the side of "high" rather than "low."
I also checked pH and TA - they were just a bit higher than what was recommended (7.8 and 230, respectively). I could/should have left them alone, but I chose to add Sodium Bisulfate to try to drop the pH a little to get it "just right" at 7.6. I added approximately 24oz per the dosage guidelines listed on the bottle.
4hrs after adding chemicals, my test results (partial) were:
pH: 8.2 (WHAT??)
T/A: 270 (?!?)
Here are my test results as of today (24hrs later)
pH: 8.2 (Grrrr)
T/A: 210 (Hmmm)
Soooo...what to do now? How to drop that pH? I added acid yesterday and the pH went UP! Why???
Can/should we still close tomorrow? What are the concerns w/ that pH being so high? What a mess.
Thanks in advance,