Can't get a good wave

[FishyFishy!]

I had way more success with my nano's when I had them fully submerged, sitting right beside eachother, and the pulse set to a quarter strength (faster). I'm not sure that the height of those boxes out of the water will be any good for you. They will also most likely be pretty noisey.

With that setup, I had a 1 inch wave in a 5 foot 131 gallon.