Hey, Here is what you should do. Read the first thread and links in the thread by Beth on this page. Then get a couple of books such as The New Marine Aquarium by Peletta, The Conscientious Marine Aquarist by Fenner. Read them and then research youe questions here, use the search buttan at the top of this page. I researched and read posts at this site for over a month before I bought ANYTHING. Take what the guys at the LFS have to say and research it here before you make any decisions. Get the biggest tank you can. And try not to skimp on the equipment. Be prepared to spend some money! Welcome and good luck.