Let me start by saying I like snails. I introduced Mystery Snails, Rams Horn and Nerite Snails. I didn't bother rinsing plants, because well snails are natural. So somewhere along the way, in a plant, I picked up an assassin snail and pond snails. Now I have a pretty cool colony of assassin snails who feast on baby snails. I am no expert, but I read all the time about assassin snails taking down a full sized Nerite or Mystery snail. I watch them often, but never seen them do more than pass each other. I can't imagine he could do any damage to my adult snails.
