About a year ago I was having a pyramid snail problem, so after scrubbing and scrubbing my clams, I gave up and sold my clams. My thinking was that the snails would not be able to survive too long without the clams. Well it has been a year+ without clams, and I still have multitudes of pyramis snails. I have a six-line wrasse, but he does nothing. How much longer can they survive, and what are they eating to stay alive now?