pooltrouble

I have a 40500 gallon vinyl pool with an alkalinity reading of 230 at the opening of the pool. I use liquid chlorine as a sanitizer. I have been adding muratic acid to reduce the alkalinity - 6 gallons over a two week period. The alkalinity is now reading 150. The PH is never lower than 7 ppm. I read on the forum about agitating the water. Is it to late to start that process now that I have added all the muratic acid? Is the water safe to swimming in with that amount of acid in the water?