I maybe wrong but Kalk/ lime water is more for helping Ca levels but does add some Alk. 2 teaspoons per gallon is saturation unless you add vinagar to it also but that can cause other problems, Here is a link on it.
What Your Grandmother Never Told You About Lime by Randy Holmes-Farley - Reefkeeping.com
What Your Grandmother Never Told You About Lime by Randy Holmes-Farley - Reefkeeping.com