I've got 3) 180's and 125 in my basement "den"
2) 75's and a triple stack of 40b in a small room off the "den"
my living room (2nd floor) has a 90gal, and a dbl 29gallon, theres a 65 that straddles the living room/kitchen
same floor, have a mini 40b reef in my office
thinking about using my garage for the rest of the tanks and 300gal stock tank
also converted my 20x10x4 pool to a koi pond