You can't really glue soft corals like Xenia. Its better to let it attach to some rubble first then glue the rubble where you want it. The other way to do it is to attach it to rubble with bridal veil material which is sort of like the material that they use to make aquarium fish nets. You can get bridal veil in the fabric dept. at Wal-Mart for about $1/yd.

Gary