OK so yesterday we actually swam in the pool! Yay! After 18 days of shocking and a few days to let the FC settle down, and it was actually warm enough - ahhh, felt good.
So, I want to get everything just right. I measured TA at 70, so I added baking soda to bring it up to 90. Today, it was at 90. OK so far. My pH was at 7.2, so I added Borax to bring it up to 7.5. Afterwards, it was right at 7.5, so far so good, right?
Now I went to adjust my CYA. It was at 40 or so, and I added some CYA (sock through the skimmer) and it took all night & day for it to dissolve completely. Pump ran all night, and I just did a full chemistry check:
FC: 5+ (just a bit more yellow than 5)
pH: 6.8 (?!)
So it looks like I hit all of my targets, but for some reason the pH is down again. Is that the normal reaction when adding CYA? I assume so, since it's acidic.
I just added more Borax to bring the pH back up. Hopefully I'm doing all of this right...
Thanks. Just want a sanity check here... I'm still pretty new at this. Last year, I just ran the chlorine generator 4 hours a day and took pool samples to the local shop, did whatever they said...