Quote Originally Posted by docwalker
Not if you maintain a proper pH. The reduction in alkalinity is a result of lower your pH to 6.8 or so which converts the carbonates into carbonic acid. Carbon dioxide is then released into the atmosphere by aerating.
Have to differ from my own experiences. I have 2 deck jets, a spillover spa, and 2 waterfalls and when they are all running daily I do see a drop in the TA. It is not much....but it does occur. My pH is usually 7.4 or above (swg)