sump design

[rocksteveo]

currently in my sump it has 3 chambers, the left chamber has been blocked off and made into top off water. now id like to remove top off and convert it into more tank water and pack it with live rock, now my question is whats the best way to get water from my display to this chamber. im using herbie style drain at the moment, would moving my "e" drain over there to dump water in or would T"ing off return line be a better choice. thanks steve