So I tested my water today and my pH was 7.8 and TA 150. I read that you were supposed to add muriatic acid and aerate the pool to drop the pH and TA levels. My question is that will the TA level return back to 150 after I drop it down to around 90? Also, my tap water's pH is about 7.8 so does that mean every time I refill the volume of water that has been evaporated that I will have to use muriatic acid? Additionally, how do you aerate a pool? My pool is a fiberglass pool by the way.