Heres some pics(links) My Sump RoomThe Top Sump (refugium)to my DIY sumps(50g rubbermaid agricultural horse troughs) and a pic of the top sump(refugium). I made the over flow in the middle with some acrylic, and the grey box on the edge of the sump is a photo machine developing tray I picked up at a surplus store. My systems been up since Feb 99.