With the slurry methods, you typically want to oversaturate the make up water as high as possible, and then only add back enough to adjust your ph swing to where you want it -- a bit of a balancing act to get it down pat. The water will only absorb so much of the kalk, and the remainder will precipitate to the bottom of the container -- make sure to only add the parts that are thoroughly absorbed, not the precipitate at the bottom of the container -- this is still 'unactivated' kalk, and the next time you top off with water, the limewater left in the container will begin the saturation of the fresh water.

-Corruption