I had one turn up with some live plants about 6 weeks ago. He hasn't multiplied though. I like him, he moves quickly and along with my horned snails they manage to keep the algae to a minimum!
When I saw this little snail...which I still havent seen...surely I would see others by now if they were about? I am a little worried that I might have trapped him somewhere because I cleaned the tank last week and moved my plants a little....I hope I havent put something on top of him