I'm building a tank to house all my LPS and softies so I can devote my 90 to SPS corals. The internal measurements are about 17" cubed, and it holds about 21 gallons. I'm using a bean overflow. I have leak-tested, but not put my sump into action yet. If it works as the poster who popularized it says it does; it's reportedly 100% silent and brings not a single bubble down into the sump. Since a picture is worth 1000 words, I'll not explain it here. Pics are uploading at the moment, and I'll post them as they are available. If all goes as planned, It'll be running within a few days. The overflow is kinda unique in that the vertical weir portion is simply glass, and has no teeth. Also, the return is plumbed through the overflow box. It's gonna be pretty sweet if I haven't missed anything. The build is also unique in that I'm going to see if moving 600 GPH (30X tank volume turnover) through the sump will produce ample water movement without powerheads. I'm pretty excited, as this has been months in the planning. I have about 60 or so lbs. of LR that I've been curing in total darkness in a Rubbermaid Tote with a powerhead with oxygenation (protein skimmer powerhead with the venturi att'd) for about 4 months now--changing the water monthly and swishing the rocks upon each change. The rock is cleaner than the Men's room at a Cheesecake Factory. It's so clean that the makers of Lysol, Oxyclean, Brillo and Comet all offered me about $100 per pound, but I had to turn them down. It's so clean, I caught my wire brush crying in the corner, but I digress. More to come shortly! I'll be needing a 150W capable DE halide pendant to house the bulb I already have. I also have the ballast--so I need only the pendant housing. See the Wanted ad for more info.