I am constantly putting acid in my pool to keep the PH at 7.6 or less. Probably about an average of 12 oz. per day. My pool it 13-15,000 gallons. About every 5 or six weeks I find my Alkalinity lever has dropped from 90 to 60 ppm. The problem is putting acid in the pool to lower the PH, also lowers the Alkalinity. Likewise putting baking soda in the pool to raise the Alkalinity also raises the PH. The cat is chasing its tail. Do you recommend a dose of adding Borax will help with this problem?