Sump/fuges can be made easily and cheaply out of a store bought plastic bin. The nice thing about them is you can bend and fold them into an already existing stand on a DT that's up and running, you can't do that with most existing system unless you keep it real small. Big Box stores have every shape and size! I keep my nitrates reading 0 on API, with LR, NO deep beds in the DT, and NO sand in my sump. I do use a Skimmer and a large 'chaeto basket'. I'm attaching a pics of my sump container. It's a 50gallon Rubbermaid 'roughneck', think, strudy. I squeezed in under my existing 125 long DT! YOu can see it in operation near the end of my short (3min), DT vid in my sig. Whatever you do, good luck, and keep on reefing!