My TA was up to 130, my PH 7.8. I used MA to lower my PH down to 7.2 and am now using my pressure washer to aereate the pool water to bring the PH back up to 7.8. This first process has lowered my TA down to 110. Ideally, I want to get it down to 80. I will need to do this process at least one more time (hopefully) to reach my TA goal. Can someone tell me approximately how long the aeration process takes?