The first picture is one of our 430 gallon tanks. We have another 430 gallon tank to its left, with larger and more aggressive fish in it, like Oscars and African Cichlids. The second picture is the 300 gallon tetra tank. We still have the 180 gallon tank upstairs, and the 112 gallon tank, which we use for baby guppies, platys, etc. and the pregnant female live-bearers.
EDIT: Or at least that's how it was and will be when we get back to the house in Alberta. I miss having fifteen tons of water in my basement....