I was away for a couple of days, and I was just wondering how is the pool doing? Waterbear is right, the sequestering agent will lower the ph a little, and I would think that you have enough in there now - so is there still a lot of stuff fall to the bottom of the pool? If not you can stop vacuuming to waste - You also may want to try to turn the filter off every night to see if more settles out. Let me know how you are doing