Each of the small tanks has a return pump, 2 circ pumps, heater, 1-2 light cords, ATO and its own tangle of cords and tubes, and some have a skimmer. Small equipment but it's still all there. Annoying. Can't figure out how to arrange it. Can't believe fire marshal hasn't written me up but I guess he's okay with the power strips I use and drip loops.