Yes. I've settled on 8.5 dKh. Checked 2x week. Hardly moves over the week (Kalkwasser dosed via gravity fed ATO units). Very rarely do I need to add an Alk booster due to dosing just enough of the Kalkwasser to keep the Alk level stable. Cal naturally stabilizes since both Alk and Cal are used in the exact same ratio in a reef tank, or the ocean.
Alkalinity stability issues seem to vex a lot of people, unfortunately.
Alkalinity stability issues seem to vex a lot of people, unfortunately.