Setting up a saltwater aquarium

Well the last few weeks have been occupied with setting up a saltwater aquarium.  Sarah promised Ella a fish if she would stop sucking her thumb.  Sarah thought it would be a simple Beta fish, small, easy to take care of.  But Ella showed me a clownfish, no doubt due to Finding Nemo.  Saltwater are significantly harder to setup and maintain than a simple beta fish, but I have a tendency to overdue things.