The reef tank setup is primarily geared towards invertebrates, corals and anemones. The fish in this type of tank are just an afterthought. "Oh yeah, there's a fish in there". Reef keepers are more interested in keeping their corals and anemones growing and this means monitoring water parameters weekly if not daily. These invertebrates, corals and anemones can be very expensive and very hard to keep.
Reef tanks are usually set up by very experienced hobbyists because these tanks require excellent water conditions, extremely high lighting levels (expensive), water supplements, reverse osmosis and/or deionized water (expensive), and excellent filtration (usually live rock).
If monitoring your water parameters on a daily basis and spending a lot of money is your idea of a good time, then you should look in to setting up a reef tank. Seriously though, if you are just getting started with saltwater, you should probably leave the reef tank for a future time when you get more experience under your belt. We don't want to discourage you from setting up a reef tank, but we do want to make you realize the amount of research and effort that goes into getting one of these set up. If you've been doing things correctly with your other tanks you are already familiar with researching fish and equipment. A reef tank can be very rewarding and breath taking to look at when set up correctly.
Available from companies on our saltwater fish dealers page.