I put mine on each end of the tank, and I ran PVC with Tee;s and LocLine nozzles. So each end of my tank has a return line going into a 3 nozzle manifold. The LocLine nozzles all point toward the bottom of the tank right in the middle. Don't know if it's best, but it keeps current in the entire tank and is enough to bring trash off the bottom so it circulates and eventually falls over the Weir in the Overflow boxes.