Recently a green blogger was asked how to turn their energy-eating fish aquarium into a green habitat.  Whether you are a first-time aquarium owner or longtime fish lover, there are some simple and easy ways to make your experience a greener one. 1.  Start small and use less plants.  Once you start getting into the larger fish tanks like a 55-gallon freshwater tank, you'll be using around 280 and 400 kilowatt-hours annually.  When you...