I have a cheap power head from petco pointed at my surface, it works great because it can angle 45 degrees. I would say go with something like this if you don't want to spend a ton on a power head for surface agitation, if you also want more flow then I would probably get something of better quality. Oceanic BioCube Circulation Aquarium Pump is the name of the one I got and it was about $30. The Hydor Koralia Nano Water Circulation Pump is nice but I can't get mine to angle to the surface. Hope this helps.