not sure
why do you want to remove it from the rock it is on? Can you use the rock it is attached to upside down to make the cave roof ???
You can probly cut the chili coral with a razor blade and glue to a new rock just as you can with any soft coral but I am not 100^ positive.. my chili isn't upside down and has a good time.. they don't like alot of light so they seems abit smaller during the day.. they expand under actinics only and dark....
I love them.... way cool coral!!!