Can anyone give me somewhere on the internet that has been most helpful in researching different corals and their needs for food, lighting, flow, etc.? Thank you in advance. I want to read up and see which ones I can keep and keep happy as well as knowing those I shouldn't.

Picture ID would be most helpful also.

http://www.nano-reef.com/corals/

It doesn't have everything but it's a good start.

http://www.asira.org/caresheets

^^
Even better.

+1

Also, just browsing this site in general works pretty well. That is probably easier though.