Drained my pool 1/2 way 3 times. My cya is finally in check at 40-50. Green pool is now a pretty blue! I’m now having a hard time getting my ph lowered. My TA is 160 and I have added 2 gallons of 34.5% muratic acid over the last 3 days. It goes down and goes back up. Should I keep adding? Or is something else wrong?