I'm in the planning stages of upgrading from a 75 gal non-drilled to a 90 gal AGA with the Megaflow. I'd like to have it draining into a 29 gal sump/refugium combination. I'm planning to use a MAG7, so the flow rate will be 450-500 gph, however, I've read that the refugium should only get 2-3X turnover rate. How do most of you address that mismatch in flow rate? Divert only some of the flow into the refugium (via plumbing? baffles?). Or use something less than a MAG7 and reduce the overall flow rate? Thanks.