I have high TA fill water and I usually just let my TA come down over time but this year I'm going to aerate to lower it. My TA is 110 ppm and with my aerator setup it took me 6 hours to go from 7.2 to 7.4. Not hardly what I was expecting. Im in the process of improving my aerator. I have a 2 speed pump and turning it on high will probably put a ton more bubbles but I don't want to run my pump on high. High is 2HP and low is 0.25HP. Anyways I was just wandering about everyone elses setup and how fast it raises the pH.