[whatcaneyedo]

To clarify, what I meant to say is having an ATO system where your fresh water goes directly from your RO/DI unit to your tank is a really bad idea which is what I interpreted sparky's question as asking. Have your RO/DI fill a separate container and then have a unit like a Tunze Osmolator send that water to your tank. That way if your float valve or solenoid fails you dont have an unlimited amount of freshwater start shooting into your tank (only onto your floor). Sorry for the confusion.