This thread was posted in the non-photo-synthetic forum. My best guess is that he is asking the requirements to keep NPS corals.
It requires years of patience and practice in saltwater aquaria. It takes lots of research, dedication and care. I'm not very keen on NPS corals, but from what I have read, they require frequent meaty feedings, copious amounts of live zooplankton, live rotifers and live phyto. All of the food in the water column breaks down quickly, so it usually requires frequent water changes, GFO changed often, any type of filtration you can think of besides filter floss because you need continuous feedings. That's when it comes to filter feeding gorgs and other species. Some people have success feeding sun corals meaty feedings in the average reef tank. Most people don't have much luck keeping NPS corals because the care they require.
I think there's an awesome tank on RC that you can look at to get some ideas if this type of tank intrigues you. Spanko knows the link.
