I could feel a response like that coming.LOL
I have been told that a hard coral can be held in place by Super Glu Gel. However, a soft coral should be put in place where you want it and then covered with a pc of netting. Once the soft coral is attached the netting can be removed.
On the gel...place it on the hard coral, dip in water, place another drop of gel, dip in water, another gel drop, then place on rock.