Why exactly do you want to get rid of them?
Unless you've got a species that eats plants (which most pest snails do not), they make fine additions to a tank. They'll eat algae and leftover food. The reason they breed so easily is because you're either over-feeding or not cleaning the tank out enough or as regularly as needed.
The snails are just growing to a population that can be supported by the amount of food in the tank, if you limit that food source the population will start to decline to lower amount.
If you must get rid of them, botia snails will work. DO NOT use a snail killing chemical, as the sudden increase in decaying material can cause an ammonia spike unless you remove them all.