This is how I have mine, sheltered from direct flow by the rock without directly touching it, to keep the polyp from "chafing".
If you look at the sand line in the front you can tell sorta where my flow patterns go.
Info for when yours gets back on its feet (ummm feet?...hmmm, tentacles?
) I run LEDs and it seems to really like the fairly direct amount of light its getting.
Sorry if these photos are oddly sized, I'm on my phone pulling them from a memory card and mobile photobucketing them.