I've had the xenia since the beginning of the tank. The clowns love it too much to take it out. Believe me, I've thought about it.
I remove a few stalks every month or two. I usually just go drop it off at seahorse, but if anyone wants some free xenia let me know.
I like the movement and texture it gives the tank as well. It was pretty thick at that point in this picture. Growth is isolated from the main rocks too.
I may get something else for the clowns to host at some point though...