We have a 400gal tank in our dining room wall. It's plumbed to be pretty self-maintaining. I have a friend that breeds Amazon river turtles(red-headed side-necks) and we let him house his extra turtles at our house. They are really cool to watch. We have a Jack Dempsey, 2 parrot cichlids, 8 giant danios, 2 featherfin catfish, a common pleco and 4 bristlenose plecos. Oh, and a random African cichlid that kept getting returned for being too aggressive. There are also some ghost shrimp hiding out in there too. I might add the black ghost knife fish that lives in our 37gal tank when it gets big enough.