[canadawest]

My Xenia frags get knocked over all the time, and they don't seem any worse for wear. Generally I just find a spot in my rockwork where I can wedge the frag rock into. So far I haven't had to glue or putty anything in my tank.

(Although the Montipora I just got from Darren looks like it's going to need some putty to keep in place)

Hey Darren, what kind of putty are you using, and where do you buy it from?

Anyways, I wouldn't worry about the Xenia frag rock. In a couple weeks the Xenia will be moving outward and attaching itself to whatever is near it anyways, and that will cause the rest of the colony to be permanently attached there. Voila, nature's glue.