My Kenya tree dropped 1 frag on its on, 1 frag assisted by myself with a turkey baster, and 1 I just cut off in the tank with an scaple. All 3 did well, and no need to glue them to rock, they attach within ours on thier own if positioned on a small rock or shell and left in fairly still water.
The Xenia might be reacting to a change in PH, due to a recent water change or additive. Xenia will be the first softie to react to a change, but chances are, it is the hardiest softie in the tank. If your Xenia was sick because of water quality, chances are your other corals would be dead. Forgot to look when this thread was started, but i'd bet the Xenia has already made a comeback. Dakota(9)