Viagra for Soft Corals

[Scavenger]

Last weekend, I fragged off a stem of my colt coral for a friend. Since then, the poor colt has been sickly, he still expands and contracts with day/night cycle, but not near up to previous levels and base and stems are shriveled and wrinkled. It has no strength to stand upright either expanded or contracted. Is there any way of helping him through this tough time. I was wondering if a change in current or lighting would help. Maybe some phytoplanton?? Any ideas would be appreciated.