If there is a problem, it is not with that snail but with the ones you have not discovered yet. I have one snail in my tank, but that was intentional. You can remove the snail by hand and then just watch for more, if any show up.
Many fish (loaches, etc.) that will take eat snails will get pretty big. I think Dwarf Puffers will take care of some snails and stay small. However, I haven't researched compatibility of puffers with other fish.
There are probably additives, but I stay away from most of those regardless the problem I am trying to fix is. Some of them actually are not worth the money you spend on them, or could cause other problems.
You can also do a little research about how to treat plants you bring home from the
LFS to help avoid snails. One tip I've seen is to feed them with an algae wafer or a bit of raw vegetable. This may cause them to "swarm" the food so you can more easily grab them and take them out.
I currently have a high-light heavily planted tank and have been lucky to just have the one intentional snail.
Good luck!