Ok I'm looking into ATO for my tank and I was going to go with a tunze. After further research I found out the tunze when turned off and back on will cycle the ATO and pump extra fresh water into my sump even when the level is not low. My plan is to use kalkwasser in my ATO resuvoir. And I'm sure you guys and gals can see how this could be a problem. I'm trying to see what other ATO systems out there do this if any? I want to get the best of the best ato but I'm not sure if I like how tunze does this. Does anyone know a way to fix that problem or if I should just look into a different ATO? Thanks!
lol.

