...Do you think I can add the Kalwasser in with my auto-top off water instead of getting the drip system?...
James,
I don't drip Kalwasser. However, when ever adding a liquid, a limitation is the vehicle you are using. For instance, in some ATO's, they don't want anything but water to be dripped. However, like for me, I use a regular pump in a bucket, so if I want to add elements to my bucket it would not matter.
I will tell you that the problem, for some ATO's is that the ATO float valve can stick, so they need stay clean, so they don't stick. On my new tank, I have an ATO that is a couple of weeks old from from AutoTopOff which I use dual floats. I already, had the bottom float stick, and the unit stopped the water coming into tank, with the backup float.
Anyway, the concept is that some types of ATO are sensitive to anything but water. You have to check the manufacturer on whichever you choose.