^^ 100% agree with Lee- If you tap off one of the drains you can control the rate of flow through the fuge, and also have to option to lock it down if anything ever goes wrong in there..
Bear in mind the flow rate of your return pump, and how much you need/want running through the sump-fuge. There's a great advantage in this hobby to be able to dial things in to match what the tank is needing and consuming.
hth