You will need 900 GPH @ 5' just to get the minimum required 5X turnover for your tank. If there are any 90 degree bends, any long runs, or other restrictions in the return plumbing you'll need more than that. The Eheims are excellent pumps it's not capable of that kind of flow.
I would consider an external pump if space is not an issue or two Ehiems. I use Pan World pumps. They're pretty inexpensive and comparable to Iwaki japanese motor pumps.
