Hello, i have a 7-8" deresa clam that was attached to two somewhat small rocks. Seems like it got a bit top heavy and with the help of flow it tumbled on it's side and ripped the filaments that were holding it on the rock. I checked out the underside of the clam and there does not seem to be a hole or anything. The clam does not seem as responsive as in the past, closing when i block the light and such. What do you think? 
