Suggestions for a 5' long tank

[luntiz]

I currently have 2 Seio 820s in each corner facing up towards the surface to great some aggitation. Towards the center the flow is great. The water hits from both sides and breaks off, bouncing the wave towards the other end. While the center of the 5' tank (about 1 1/2') has great flow. It pretty much ends there and gets very weak, toward the point of deadspots. I wanted to know what I can purchase to create more flow throughout the whole tank.

I was thinking of purchasing 2 Tunze xxxx (don't know which ones yet) and placing them at the center pushing water against the two Seios. to great a break of water, hopefully supplying the whole tank with great flow.

Can I get some recommendations?

 

[rvitko]

I would get a 6000 but I would replace one of your Seios with it, figure you will nearly quadruple the flow you had from one Seio. I would hold off on getting a controller because you may replace the other once you see it and then you would probably want the multicontroller.