I am in the process of adding about 4 lb.s of CYA to get my level up where I want it. Seems like I recall somewhere on the forum(can't find it now) where the CYA will lower your ph? Sure enough as my CYA in a sock is in the process of dissolving, my PH that used to be perfect around 7.5,7.6 has now dropped to the low end of acceptable. Do I need to add some borax, or will the ph "correct" itself once the cya has fully dissolved and been in the water for awhile? I've been down this road last year but can't remember what I did, although I know I didn't ever add borax.
If it matters, my TA is good around 90-100