Thanks for all you input. My current pump is well suited for my (75 gal.) tank, as a matter of fact, it creates a decent ripple effect across the top surface of the water. My return is located on the opposite side so there has been decent circulation. But, just to be on the safe side I added a 402 Powerhead near the return flow (going opposite) to create even more circulation. The fish don't seem to mind it. Once again, thanks! and let me know if you have any opinions either way with this setup.