The assassin snails don't breed like the pest snails, are much bigger, easier to pull out, and have some money / trade value. They also look pretty cool.
The main thing though is that those small guys will die off naturally if there isn't enough food. Cory loves them actually because they do serve as a cleanup crew, but if their numbers are out of control you probably need to cut back on food.
https://youtu.be/e1SXvU95Ty8