The Eheim powerhead is one of the nicest powerheads I've ever used. It's larger than others, but my goodness!
Check out these suction cups:

It moves in 3 directions without effort:

I didn't use the Venturi attachments. The small input/output filter kits would work with this if you want to direct the flow. Since I'm committed with the 75 gallon tank with the set-up, this is a good option in the future. I take it back, Whitepine! I won't knock it until I try it.
