so i got thinking today as i plan to build a large tank for some rays i was going to put it in my basement but i have a nice big open space on the main floor of my house that will fit a large tank perfectly in my living room and it would make a great show tank but how can i know if my floors can handle a 400 gal tank????? i can post pics of the spot from the basement where you can see the floor joists and the 2 cement load bearing walls that intersect in that corner