Although I'm on my 3rd pool, this is my first one with a "water feature" - that is, the water return waterfall from the spa to the main pool. After reading about the effects of aeration in the various forum threads (related to method for reducing TA), I now wonder if I'm "stuck" with always chasing pH. I'm essentially getting 8 hours a day of at least some aeration (not as extensive as some of the rigs I've seen here, but, still some) which would seem to constantly put "pressure" on increasing pH, which I then have to lower with MA. Am I just stuck in this loop? The only thing I can think to do is close off the return to the spa so there would no longer be a waterfall but then the spa would be "stagnant".