Putting Kalk in the ATO?

[ScubaSteve]

I'd like to put kalk into my ATO help help keep my parameters more stable and just use 2-part to tweak each accordingly. The reason for this is that I can get very busy at work and am sometimes not home to dose or simply don't have time. I'd like to make life a bit easier. Second reason is my pH is consistently low despite all efforts to raise it. I'd like to have kalk help keep the pH up. I am currently using a Tunze ATO to top up. I evaporate a retarded amount of water; like a gallon a day on a 50 gallon tank.

I would like to mix up kalk at <0.5 tsp/gallon for the first while and see how the system does and then adjust it from there.

Problem, Kalk scares the crap out of me. Anyone have any advice to share that can help me here? Who uses kalk in their top off?