I switched my pool to a SWG about 2 months ago, and I find my pH constantly hovering around 8.0. I have to add about half a gallon of Home Depot Muriatic Acid about every 2 weeks to get it down to around 7.6. I have gone through 2 gallons in about 2 months now. 21,000 gallon pool. Any ideas what is causing the constant increase in pH? All other numbers are in line with where they should be.