Just thought I would share the experience, after reading someone did this to their snails, I decided to start doing the same and squash them with my tweezers. I though wouldn't the dead snail in the tank cause some pollution? so I tried on a coulple, as soon as they hit the gravel the cherries were all fighting to eat the dead squashed snail! What a bonus! No snails and a mixed died for the shrimp hahaha