Jas1 -
Filter is gone.
The PVC + Pump is the return pump.
Yes, I built the refugium, it's just a 10 gallon. Let me see if I can get some closer pics
Sorry, I could't get a good enough picture of the overflow, but basically it's just pvc that comes down into the refugium. And on the return pump here are 2 pictures from when it's inside the refugium and as it is going up the back, from there it's just pvc pipe that flows into the tank.
