Just did a water change and vacuumed part of my sand bed. Must have unearthed this guy. Noticed a new shell moving around a few hours later. It was out of place. I know what my CUC looks like. I know what kind of snail this is but the thing is I’ve never bought one. Got here somehow. I was just surprised how big it is. I had this thing get into my tank and it sat in the sand and got pretty big before I noticed it. So I figured I’d pose the question: what’s the biggest thing you found in your tank you didn’t put there? How big can a hitchhiker get before we find them? Thankfully these guys are good. Wonder what else is hiding