I have a reef set up now in the tank. A local guy that has 12 reef tanks in his house was fortunately taking down one of his tanks to sell and amazingly sold me about 70 lbs of live rock that has been running in a tank/sump for a few years for a measly $40. Along with a couple cups of sand from the tank to seed my sand with. I figured if I paid $100 I was getting a real good deal.