Product review (3 stars): Not enough to stop the white dust
This cartridge obviously works as it fills up over time and becomes full of minerals that rattle around when you shake it
but it is not sufficient even with the little pellets I drop into the tank.
 And as it rains mineral dust that ruins my books and music, I am going to stick to non electric options.
I am in Indiana and the water is harder than a hard hard frozen thing in a blizzard. Maybe even harder.