Need pump advise. What pump will run a ro/di filter?

[Fish]

Thanks Tony. I am concious of my electrical consumption (eg, I'm going T5HO to save over halide), but I'm not quite a hippie ( :
I guess if I was really "green" this wouldn't be the best hobby for me. Mostly my issue is with water. I lived for a couple years in a country where the water wasn't drinkable and you had to use bottled water just to brush your teeth. I guess it kinda made an impression on me and I'm still amazed that we use drinking water to flush our toilets here.
I think that a pump that would allow me to push wastewater through a sprinkler would be a decent compromise.

- Chad