They will eat your plants, not your pants!
Oh no I need my pants cleaned! Jk. But I thew some of my baby apple snails in, it's been a few days, I seen that they are just now starting to eat the algae on the glass. I have a Hi-Finned banned sharks that is no help at all..
But! I did find a tiny hole in one of my lilly leaves, I'm going to keep an eye on them and see what happens