Do you know what the water level will be set at for the internal overflow? I am wondering how either Miracles or C2C handles the internal overflow and the euro - is the top of the overflow designed to be right up against the euro?, and if so, how do you get anything out of the overflow if it happens to make it's way in there? Or is there a gap between the euro and the overflow, and wouldn't that set the waterline pretty low relative to the top of the tank?