This site is great, soooo glad we found it!
We have a new agp, vinyl, 13,300 gallons.
I've been lowering TA from 310, trying for 80 or so. After 1 gallon of acid were at around 250-275. I'm hoping its closer to the 250 level, which leads to my first question. I also have the aerator going now to get pH back up.
My first question is regarding the TA test. Am I just looking for any sign of pink? There's a point where the water goes clear with a very slight pink hue, but then the next drop it goes bright pink. Since my level are high I've been using the 10ml method so every drop is 25 ppm.
Based on the pool calculator I'm guessing I still need around another 3 gallons.
My second question is after pH and TA are fixed (tap pH was 7.6 to start so Im just trying to get it back there) is CYA the next (week long) step?
Then I shock? Am I shocking with bleach? I know bleach is the usual chlorine source, I just wasn't sure if that's used to shock as well.