You coul say I have a sump/fish room. What I did was put my 80 gal
tank on the finished side of the basement and then there is a simple paneled wall between it and my fishroom. I cut some holes in the paneling and ran the plumbing thru the wall and I put my sump (30 gal
tank) in my fishroom on the floor.
Its really not much different than having the sump under the tank. The only difference is there is a wall between the two at this point.