i have a 30 oceanic cube and yeah i totally wish i could have a vortech, but i found the flow hard to create without koralias or tunzes ... tunzes are too expensive for me .... i tried a modded MJ400 and that flow was AMAZING and bounced all over the tank, but too much flow for a non-sps tank ...i have a 1200 low down in the tank, shooting through a cave to the front wall and a mag 7 return at the top, the surface movement is great and the flow is random .... a 20x20 footprint is cool, but it is kinda hard to get right IMO ... we'll see as i keep adding stuff, what does well where ... i still have an unhappy colt coral which did its best in a tank with hardly any flow for some reason