I plan on doing exactly that once the rock is cycled. I'm going to run two more on the other side, and initially switch them every 15 minutes using a coralife light timer I already have.
I've been trying to figure out exactly how some of the wavemakers work. I need one that I can set the interval the pumps are run. Most pulsate and stuff, while I just need to switch back and forth.
by the way, it takes about 15 seconds for it to get to full speed from a stopped state. Don't know how long if it was running the opposite direction, though. I've considered I can get exact control of the water flow just by lowering the timer. The shorter the timer, the less flow the tank gets.
I'm using the rocks' cycling time as a delay for buying the other two pumps and deciding on my lighting
I've got a 150W MH ballast/bulb that needs a pendant/fixture, but it's not enough for sps, probably. The water's only 12" deep, but I still think it might not be enough. I could go T5's, but then they'd only be useful again for another 1'x2' tank. I considered T5 retrofit with an icecap 660. The endcaps and ballast could be reused. Or a 250W MH. it could be reused on another tank down the road too.
I don't forsee this tank running for longer than a year probably, as I'll likely upgrade it to a larger size if I run into disposable money or something heh.