Overdoing it is whan your bed is a matress on a tank, your dinner table is your 55 gallon and chairs are 5 gallon betta tanks, your windows, having 2 layers of glass have fish in between them, your TV has 1 channel: the discus channel(you hollowed it out to make another tank), your computer has only GUPPY.exe (ditto) and to stop overstocking you're supplying at least 5 pet stores in your area.