Help wanted. I am setting up oceanic 144 gal half circle. I have 2 overfows and 2 returns, both driven by ext mag 12's. Bear in mind....there is still time for change(taking down 90 and using some of the loot) One of the returns is via sea swirl and the other divides between the two overflows and descends diagonally across the overflow boxes as they descend behing the live rock and coral. the later of the two returns is a loc-line spray bar. I have been drooling/researching the tunze pumps, controllers and wave box but have no idea how any of these woud behave in a half circle.