Hi SLM
Snails are such a pest and they 'grow' like weed, you could also try a snail farm project on the side, and see how that goes.
You'd just need a small container, with a contaminated plant (check a plant at the LFS where there are a few snails in the tank where you took the plant from). Alternatively, the LFS would be glad to give you a couple of their ramshorns or malaysian trumpet snails for free.
Put a limestone or broken shells substrate (you can find the shells on the beach, or in a dollar store).
All you do then, is keep a fresh piece of lettuce in there, and once in a while go fish your snails from your farm.
We sadly don't need a snail farm as my main community tank is doing a great job at it

. So that's what we do for our DPs.