I suspect the pool store's measurement is off. My borate level went from 12 PPM to 7 PPM in a week's time?
FC: 3 PPM
Also, my SWG does not seem to be producing chlorine. It has read in the range of 0 to .55 PPM for the last few weeks. I've had to add bleach to keep things in range. Any thoughts about that too? I wonder if there is an algae issue, though my water is crystal clear. My pool temperature the past few weeks has been in the 84 to 88 range.