So, I have an above ground spa attached to my pool, and filter it everyday with water pulled from the pool which in turn spills over back into the pool. I know that in order to lower your TA you would add Muriatic to bring your pH down lower than normal, AND then aerate the pool to only bring the pH back up. So my question is, since I'm always aerating the pool with with my spillover, am I always going to be fighting a high pH? I've only had the pool for 7 months, and that seems to be the case. Any suggestions?