Im am looking into getting a dosing pumps for the 2 part. I plan on adding kalk to a 13 gallon tub with my RODI and hooking up the tunze osmolator. Do you see any significant problems or issues with that. Is it common for an ato to malfunction and add too much water possibly causing overflow and elevated ph levels. I am also thinking about getting a second dosing pump instead of the ato. i am trying to make my system as automated as possible with as little possible failure. thoughts?