Okay so I got a assassin snail this after noon to help with me snail explosion. I only got one as I don't wish to eliminate them just control it. Well after acclimating the assassin for 1hr I dropped him in the tank and he freaks out and closes his trapdoor and doesn't move for an hour or so. Then he crawls to the top of the tank and chills for a little and then at lights out he starts crawling back down and I notice some white stuff on his back. Has anyone seen this before? Idk what it is. Here's a pic but can't see too good as it's in the front of the tank and lights are dim that high up Right at the second spiral you can kind of see it.