BD, I know you said you're on well, but I feel you might actually be better off changing out some of that water since its virtually impossible to attribute the strange results to any single factor -- eg a gallon of antifreeze would in theory exacerbate ccs, the MPS gives a cc reading, trac amounts of other chemicals may also be interfering with your FC...
If your well water is a bit nasty like mine, (iron, sulphur etc.) you could try to refill in partial drain via whoe home softener, or look into rigging up a couple of 10" Pentek filter housing, 3/4", with a 5 micron and a 1 micron filter.
I'd link you to them in Amazon but realize since you're in CA you'd need a different source.
If your well water is a bit nasty like mine, (iron, sulphur etc.) you could try to refill in partial drain via whoe home softener, or look into rigging up a couple of 10" Pentek filter housing, 3/4", with a 5 micron and a 1 micron filter.
I'd link you to them in Amazon but realize since you're in CA you'd need a different source.
