Personally, I would go with 2 of these. http://www.petmountain.com/product/aquarium-water-pumps/512724/koralia-2-600-gph-9-watts-.html If you buy today, you can use the 5% off and save a little cash also. Koralia pumps are very good and you're getting more flow for the same price. Also, using 2 pumps will give you a little better control of where you have the flow vs. just the 1.