i had one. i've moved up to what is called a nano cause it's more than 2.5 gallons. my new one is 5 gal.
here's a pic of my old 2 gal.
the way that i found to get smaller corals is to find frags at LFS's. they'll usually cut you great deals on stuff that has broken off of larger main colonies.
and here's my new tank. just for comparison.
