Ok so I built a kalk reactor with scraps and junk and here it is:

It is 24" tall and 4" diameter with just over 1.5g capacity and the mixing pump is some oddball type fountain pump I had that is way overkill at 600gph. My dosing pump delivers around 2.5ml through the reactor every minute which is around 1g per day. Wiring connections and timers look like so:

Since the reactor is short and the pump too large I used a appliance timer running through a 8pin relay and a 8pin timer so it works like this: every 6hours the dosing pump kicks off for one hour to allow mixing and settling time and the mixing pump kicks on for 2 minutes. The one hour delay allows the kalk powder to settle and not dose cloudy kalk fluid to the tank. So far my ph stays pretty stable at around 8.2-8.3 throughout the day. Does this setup sound ok? Any tips or suggestions or reasons why this is not correct? Sorry I dont know much about them and just built one for grins not really expecting to hook it up.