I used to have a 135 gallon tank with a home made spray bar that was made from pvc pipe painted green with holes drilled into it at regular intervals. I used two Magnum 350 canister filters which were plumbed into pvc elbows that curved over the top of the frame and into the tank.
I cut the end of the stock water return pipes off and rigged them to fit into the pvc elbows. The elbows at the end of the spray bar was not glued to the bar so that it could be cleaned if needed. The holes were drilled so that some of the water would spray across the surface while others sprayed towards the bottom. There was plenty of water turnover and a nice current which ran down the back of the tank.