Hi everyone this is my first post, and first tank. It’s a mix of corral and fish. I bought an establishment tank, and the clam was blue and beautiful. When the guys moved the tank they put him on the rock. He has yet to open, and it’s been a week and a half. I moved him the other day, to see if air was inside, but nothing. He hadn’t clamped to the rock either. I noticed last week so white slime coming out of him. Yesterday he was open just a touch, and today it’s completely shut. The water was tested and is good. I’m at a loss, any ideas? Thank you.