Hi, I just started my first saltwater aquarium over a week ago. I am looking for some suggestions. I have been researching whether I should use a live corals and reefs or the artificial stuff. I have looked high and low for some reefs that are affordable and I find most of the artificial stuff to be high. Does anyone know of somewhere or someone who is selling some used living color reef inserts in the chicagoland area. or does anyone know how I can start up a cheap reef tank and what things would I need. I have no clue as to what I am doing and I have a bubble shaped or dome aquarium thats 20 gallons. The dimension of my aquarium is 24x10 and I have a hang on back filter, sand and one fish (coral beauty) so far in my tank. Thanks any suggestion is greatly appreciated.