| Ok,
To back up your theories, I turned off all of my powerheads today and watched....tha-thump, tha-thump..they came back to life. So, now I've shifted powerheads to provide flow to my other areas of the tank that need it and I'm keeping the xenias in a still part. The only thing that is keeping them from "super-pumping" now is the fact that my percula rarely leaves them for more than a couple minutes. Other than that, he rolls in them constantly as if it was an anemone.
Thanks for all of your input. I appreciate it.
Steve | 
