Can i put a timer on my pump/filter?

[aquarium]

Gee...water comes out of a 1.5" pipe real fast.

Heh.

I managed a construction project that we built over a 66" diameter water main while it was being rerouted. I made them mark its location during the footings drilling phase. If we broke it, they said it would put out 55 acre feet of water into downtown Austin before they could get it shut off. That's 55 acres a foot deep, or one acre 55 feet deep in water.

Yeah, go to Home Depot and look for Intermatic timers. They come in a grey plastic enclosure and have a yellow disk with the time of day markings on it.