ok, took ten drops of 'down' to stabilize at 5-6, from 7 in approx 2.5-3 gals, this will be more water than my system can hold, but its good to get a feel for what it takes at what volume.

since it has been hours, i checked the tapwater i put aside earlier.
looks like in about 10 hrs, it went up about 1/2-3/4 a point-ish.
thats just the plain water. hoping i wont need the calmag, but, u tell me.

this is hopefully not going to be as complicated as it may appear.