I have a 25,000 gallon in ground gunnite pool which is four months old and live in Louisiana. My pH tends to run high, which my local pool builder told me is typical of a new plaster pool, and I have been adding muriatic acid (per his recommendation) about every other week when the pH has risen above 8.0. However, my alkalinity has been dropping into the 60s. He recommended adding a total of 18 lbs of Alkalinity Plus and instructed me to add 6 pounds at a time and then add muriatic acid a day or two later to keep the pH down, then wait a few days and repeat this process twice more over a weeks time . Now it’s been a couple of weeks and it seems that I am now back to where I started with the pH at 8.0 and alkalinity in the 60s. I realize that adding alkalinity will cause the pH to rise some but it seems that I’ve gotten nowhere with this. Am I adding it wrong or is it expected for the pH to keep going up in a new plaster pool? Any recommendations on how to add Alkalinity Plus differently? I added it with the pump on high, then noticed some recommendations to turn off the pump for a few hours after adding it...would this make a difference?