My pool water is clear the chorline numbers are fine. The pool is 18 ft round. The water volume is 7600 gallons. The PH is at 6.2. I want to raise it of course. I have put in the chemical PH raiser the that came with the pool. That has not raised the ph level. I read here you can add Borax to raise the PH balance. I stopped at WALMAT and bought a box. My question is how much should I put in to raise the PH to proper levels. We have had a lot of rain here in NJ where I live in the past two weeks.