I have my returns (mag 12) facing parrallel with the bottom of the tank, blowing out across the tank.
I have a maxijet blowing behind the rockwork, 1/2 down the wall on the back.
A seio 600 something is at the top of the side pane, facing a little twords the back of the tank blowing across the workwork, and same thing on the other end.
My tank is a 125 mixed reef.
Feduke