56,000 gal, 44 x 22 ft pool. Pool has been stable and clear all summer. Recently the alkalinity raised to about 180 ppm and ph went to about 8 ppm. At the advice of the local pool supply store, I added 1 gallon of muriatic acid. I waited 48 hours and saw little to no change in levels. I added another gallon of muriatic adid. After 2 days I still see no change in alkalinity or ph. What must I do to bring these levels back to an acceptable level.