My three sw tanks are in the kitchen...I have a FW tank in the living room. I'm getting another tank (55 gallon) that I will be putting in the kitchen also. That is the only room in the house that the floor is even and I have room enough. I live in a 60 year old farm house and the floors are all uneven, accept the kitchen we added a room to it and floor is sound. The living room is not too bad uneven but with the size I'm better off in the kitchen. I'll be sticking an air conditioner in there for the summer, it gets a little hot.