The third installment of my fish room series talks about the basics of electricity when setting up a room. There are two basic concepts to consider. First, make sure that there is enough capacity in the room to meet projected needs. Second, take steps to reduce the energy consumption of the room. Electricity is the most expensive consumable in a fish room. I know more than a few people who have been caught by surprise by a higher-than-expected electricity bill after turning on a new rack of tanks. As with anything, there is a way to go cheap and a way to go expensive. When it comes to electricity, however, paying up front for more energy-efficient equipment (air pumps, space heaters, appliances and especially lights) will earn their money back in energy savings.