My CYA was too high and so I emptied about 2/3 of my pool, readjusted everything so that pH 7.4, FC 9.0, TA 160, CH 250, CYA 70 with crystal clear water. I then added 99% boric acid at the amount noted in the pool calculator. I added it a couple of pounds at a time which I pre mixed in a 5 gal...