How much Borax to raise pH?

[mas985]

TA really has not been the issue since I need to lower PH so much. It pretty much stays 100-120 ppm. CH on the otherhand is a battle. Next winter I will do a refill when the city uses more surface water than well water and see if I cannot start out the season at 200 ppm. It does make me wish I had chosen a fiberglass pool though.

[Simmons99]

Well it worked - this morning PH is 7.5 and TA is 90.