turbulent waters

[Delphinus]

A maxijet 1200? How big is your tank? I thought it was like a 55g but maybe I'm thinking of someone else's tank...

What I don't like about a single powerhead is it will be very difficult to create a non-laminar-flow, ultimately you'll get a nice whirlpool. Personally over a ~50g I think something like two maxijet 750's or maybe 900's at each side of the tank, pointing towards each other. The streams will meet and cause a lot of nice random turbulence.