actually feeding sps isn't the easiest thing, as most don't have large polyps (with the exception of some). I feed them rotifers and oyster feast. They definitely can grab some, but don't reach most. Those ones that don't just add nutrients that they will absorb, and are good as long as you don't have too many.
I think most people who are first starting sps need to know what their system needs to keep nutrients low enough for them to thrive before they worrying about what to feed them. Just a thought.