Identifying snail

I found a what i thought was an empty snail shell on the side of a small lake in Belgium. It was on the dry ground so I assumed it was empty and dead, I even looked inside it to be sure, so I took it with me. A week later I put it as a decorative piece in my aquarium and it somehow came back to live after sitting on my desk for a week. Does someone know what species of snail this is and if it will eat my plants or not? Thank you!