not that i know of. kalkwasser keeps levels stable more than raising them. to raise levels, you will need to use a 2 (or three) part additive.
test for everything. every system is different and i've heard of many situations where the same dosing regimen yielded completely different results.
just a FYI-
i have kept tanks full of corals for years without any dosing....just regular water changes. if you are seeing a drastic imbalance and are definitely in need of supplemental ca
, and mag, i would suggest setting up dosing pumps and containers. it's pretty easy to do and you can put them on timers so that you can't over dose.