Also, understand what drives snail population growth: overfeeding, organic waste, and decaying plants.
If you remove excess food and dead plants, there is less for the snails to eat, and they cannot multiply. It's really very simple to deal with snails if you gave a balanced aquarium that is regularly cleaned (to remove dead leaves and fish waste) and where the fish are not overfed. Once the population is stable, you can crop them periodically using any one of a variety of tricks or traps. There's a German one called the "LimCollect" that can work well. It's sort of a lobster pot for snails. You bait it, the snails crawl in, but can't crawl out.
Snails cannot magically multiply without food. So you will not get a snail population growth in a tank that has nothing in it but water and gravel. If you have too many snails, it means you are overfeeding or undercleaning.
Cheers,
Neale