I found this site by doing what I do everytime I get interested in a subject that I know little about . . . googled the subject (In this case "saltwater fish") and "Discussion board" and found this.
Figured out a long time ago that the best experts in any given subject are the real-world users. Advice from books is great, advice from retailers is great (About 5% of the time!), but nothing beats first-hand experience. There are discussion boards on every subject you can imagine.