refuge come after the sump and be higher then the display tank so all i would have to do is drill a hole and let the water flow?
That is the by far the best way to set up a fuge. A true refugium is set up that way, and meant to be seen. If you have the room, etc. definitely do it. Many times pumps destroy or inhibit animals from getting from the fuge to the tank, negating many of the benefits. I'd imagine you could then just "T" off the return so the fuge gets some flow, and use a large enough pump so it will still provide the main w/ water movement as well. I'm not positive, just a quick thought.