~250 gal 3 person tub, 2 months old.
Nature 2, Ozone (24/7 via circ pump), 1TBS MPS upon daily use, 1TBS Dichlor weekly.
I have noticed that my alkalinity keeps going low and PH goes low by a small amount with it.
I add Baking Soda to bring it back to proper levels, at about 4TBS per week. That seems excessive to me, I thought once I got the Alkalinity set initially, it would not need to be messed with much.
This is city water (have not tested fresh tap water) what would cause my Alkalinity to keep dropping, and is that normal?