Sounds good; usually you mix, let it settle, then dose. I found with the kalk reactor I made, 6" tube, 24" tall, that the smallest pan world pump (180gph) worked perfect as a mixing pump; it kept the water in the reactor saturated but did not create a huge kalk storm, and you could dose 24/7 regardless of when the mixing pump was on. You might dose some KW into a glass and check for clarity and ph; if it's reasonably clear you're fine and you want a ph of at least 12; somewhere I seem to remember 12.5 being the optimal ph for KW.

I'm going to build another kalk reactor sometime soon (I hope!!) that will run directly off my R.O. unit, at least that's the plan. No dosing pump, just an auto top-off that will replace all the evaporated water in my sump with KW. I'm not planning on a high calcium demand on this tank so I'm confident the KW will maintain the tank, I'm actually worried that it might be too much and raise the ph too high. If that happens, I'll have to get a dosing pump.