Do snails eat live aquarium plants?
Thankfully, most small snails found in freshwater aquariums do not eat healthy aquatic plants. This includes pest, bladder, nerite, mystery, ramshorn, assassin, and Malaysian trumpet snails. If you see them nibbling on a leaf, it's usually because the leaf is dying or melting back.
To learn more about why your plant may be dying, read our article on nutrient deficiencies. If your plant's leaves are melting, it may be transitioning from emersed growth to submersed growth, which you can read about in this article.