It really isn"t needed tell your livestock depletes the alk and or calcium faster then your water changes can replenish them. Have you corrected your water quality issue yet?? R/O DI??? It is best to go slow and prioritize what will be most beneficial to your success. Introducing several things at once is a recipe for disaster. Just my .02
If you feel you have to use kalkwasser it is easy to do but requires constant testing.If done correctly you can use it as a top off also. Gravity dousing kalkwasser works well but you first need to find out what your daily evaporation is then make a drip bucket that will hold several days worth of top off. once you get the top off drip right add either pickle lime or kalkwasser made for purchase .Cr and bulk reef have calculators that will give you a good idea what to start with then adjust the amount to achieve the Alk level your shooting for.Simple enough!! Good luck