I have had my tank up and running for just under a year and I decided that I needed some upgrades. Most I figured could be done myself. So, First up, I decided the sump was most important. So it began, my very first DIY anything, and it's a sump. Not much that can go wrong really besides maybe a metric ton of bacteria just disappearing overnight (bio-balls), total loss of all livestock, flooding my whole office room with 3" of conductive salt water right next to 2 computers and a 100watt speaker system, etc. Really, not much to worry about right? So, on to the basic design: After spending forever on sites like Melevsreef, and of course 3Reef, I decided to make a Sump/fuge out of a 30 gallon tank. Design is sump on one side fuge on the other both drain into the middle return section. Sump--> Return <-- Refugium Single overflow, split with a tee above a ball valve. More on the plumbing later though. Dimensions of the tank are 36" X 12" X 16". Since I do not have a DSB in my tank, I wanted the most filtration possible from a DSB in the fuge so.... I made it HUGE. I don't need much room for a skimmer as I will be buying the SWC 160 Cone and it has a very small footprint, and the return chamber should be big enough but I want to buy an ATO anyways. ;D Well, that's about it for now so..... PIC TIME!! Firtst two baffles. On the left, the refugium and the right is for the skimmer. The eggcrate is to keep the macro algae and snails in there 8) Let's hear what you guys think! Constructive criticism time!