Hi,
I was looking at this picture again and am curious is this elegance coral is more coned shaped? Versus, say, a cup shape. If its more cone shaped, where it cannot stand up on its own, but rather lays on its side, I would try propping it in a piece of PVC to get the flesh off of the sand. This may help.
I had one of my cone shaped ones tip over, off of its PVC, and it looks very much like yours. I have others that are more cup shaped that sit on their own.
Not sure if this will fix it, but it could help slightly.
Marcos