I bought a Crocea clam about 3 weeks ago. It's right around 2 to 2.5 inches. I'm having a problem keeping it on a hard surface for the foot to take hold because my tangs swim by and have to peck at the shell. They don't go after the mantle at all but the clam always ends up on its' side. I even got a clam mount but that hasn't helped. Does anyone have any suggestions on how I can protect this clam long enough to grab hold of a form substrate be it rubble rock or a clam mount?