Its 8X4X4. I know i'm going the salt water route. So there will be the "Finding Nemo" fish to entertain my daughter, but I want to find a few rare/exotic types to put in there also. I wanted lion fish, but I don't want them to eat everything in the tank...so I'll keep looking. I'm trying to design a sump filtration system at this point. I want to do it on a budget, but I don't wanna miss any important parts. I want to have an in sump skimmer, UV filtration, the bioballs (of course) and some more stuff. I've been looking into using rubermade storage bins for each of the parts of the sump. getting water to flow between the 3 parts is the challenge. I've also been looking into using a shop light with a UV bulb for the uv filtration...i've seen a few guys talk about pulling that off... at anyrate, what ideas do you guys have?