I had a 20 gallon long in my office for a couple of years. With the evolution of the 'green kick' and people being anal about energy efficiency it kind of divided our office. Some people didn't like that I was powering a powerhead, HOB fuge pump, skimmer pump, lights, and a heater for only 8 hours of enjoyment a day. Other people, including customers, thought it was pretty neat and enjoyed it. I had it until we had a blizzard that closed shop up for a few days with no power. I had keys but couldn't do anything for my pair of clowns and eventually they died. I was really discouraged and since it could easily happen again I ended up using that tank for a sump on my home tank (where I have a generator in case the power goes out for the tank). I was pretty good on water changes and feeding but felt bad I couldn't really give the critters the attention they deserved.