Wavemakers are great inventions, but you can set up a couple of power heads on simple timers you get at a home store for a lot cheaper. The power heads just plug into the wavemaker anyway, so you can always upgrade later. When setting on-off times on those cheap timers, try to set it so that they are on more than off. I recently bought a new timer that has little switches that will turn on or off as often as every 30 minutes without any removable tabs that you can lose. The wavemaker will do a more random pattern.
Sonny