Ever since I finished law school 4 years ago, I think my brain appreciates not being fed anything (of the knowledge or alcohol type) and it's starting to perk up again. Oh, wait, you're talking brain corals....
I have an open brain that I will stick a piece of shrimp on periodically and watch it slowly eat it (I have to way overfeed the rest of the tank, though, to keep the shrimp and crabs off, just like Greg). I also have a closed brain, and that sends out sweeper tentacles at night. If I try and feed it during the day, no luck, food just blows right off of it. I don't know that they get all that much bigger when I feed them, but I do know that they appreciate moderate light and lower current.
By the way, the open brain was a rescue attempt from a LFS, and one thing I think that helped it to recover was a lugols dip.
[ November 15, 2001: Message edited by: davelin315 ]</p>