YOU PICKED UP XENIA AND YOU DIDN'T GET IT FROM ME?!?!?! NO WAY!!!
Haha all kidding aside, what type of xenia is it? Pom pom? Elongata? What color? Grey/silver? Red? Pink? White? Blue? Do they pulse? Fast? Slow?
I personally believe that different xenias thrive well in different enviroments so the type of xenia would be important.
But no, do not put them infront of a powerhead. Generally, dont put any coral RIGHT infront of a power head. Any softies, at least as tissues will begin to tear and what not.
HTH
Justin