DT the Seio's will provide a lot better and wider flow that your maxijets would ever do!! They are great pumps but the mounts can be, well, a pain in the arse... I would say do a hard mount on yours, forget the suction cups!! In my tank I had one seio on the side of the overflow shooting water across the front of the tank. On the other end I had one pointing the other direction but aimed towards the live rock to help break it up a bit. Whenever I feed with frozen shrimp I would hold the cube in front of the Seio and it would spray the shrimp from one end to the other and back, really with not much hitting the sand. From what I have seen on Reefcentral, in the Tunze forum, they recommend the flow coming from a corner of the tank spraying to the center. It kinda breaks up the flow and creates a random flow. I know the Seio is not as powerfull as a Tunze but you could experiment with that placement. If not I would say opposite end of the overflow, spraying straight across the tank, or slightly aimed at the live rock...but what do I know lol.... Just get another seio for a circular flow ;) Just make sure they are mounted SECURLY~!!!!