I have been thinking about reliable ways to dose kalk to maintain Ph, alkalinity, and calcium. I was wondering if anybody ever tried connecting a small lift pump to a stirrer to dose kalk via a controller. I was thinking I could place the pump in the ATO reservoir and have it leading to a kalk stirrer and then into the sump. Set the controller to activate this pump whenever Ph falls below the desired level. It would add limewater to the sump very slowly until it reaches the desired level. It seems this would be much more acurate than relying on evaporation (which fluctuates drastically by season here) to dose kalk. I am questioning if using ph to controll the dosing would provide enough alkalinity and calcium to keep up with coral demand. Furthermore, is this a stupid idea? Would a calcium reactor be a better way to go? Any insight would be very much appreciated.