Wavemaker in a 34g Cube Tank...

[fkshiu]

Try a SQWD closed-loop like melev did.

You can always just plug a few powerheads into a Red Sea Wavemaker.

If you want to go "Porsche", a tunze multicontroller with 2x6055 would be awesome. Given how much the koralia controller is, the tunze option isn't all that much more and you get a smaller footprint with a little more flow and more wave options.

If you aren't planning for a lot of SPS, you might even be able to get away with just a single tunze 6055 and a single controller if you set up your rockwork correctly and go for Gyre-type flow.