Howdy,
I generally like snails in my tank for biodiversity and control populations by regulating my feeding habits for the fish. However, if they eat plants, there is a problem and they need to go.
Depending on your tank size and stocking ideas, you could ge a group of Botias. Puffers are problematic since many eat snails only, ie. they starve to death once all snails are gone.
If you do not have invertebrates, you can use copper-based remedies from a store.
HarleyK