The beautiful Bladder Snail (Physella acuta)
 
These snails can handle a wide range of water parameters and breed prolifically. Their population can easily be controlled by their food source. If you're overfeeding, your snail population will grow significantly. If you feed much less the population will shrink over time. Bladder snails can easily be manually removed by placing a slice of cucumber in the tank overnight, to be removed by net the next day covered with snails. I would NEVER recommend controlling a snail population with chemicals. These chemicals used to kill snails will also kill countless other organisms, microscopic and otherwise. This greatly affects the balance and long term stability of the aquarium ecosystem. 
 
Not only do these beautiful snails work hard to keep your tank looking good but also make a great food source for puffer fish and other creatures that eat snails. They can be raised in a separate tank as feeders.
 
In many aquariums bladder snails don’t need to be fed directly, especially in a tank with fish. They will munch along eating fish waste, dead plants, leaf litter and many types of algae. If you have a particularly large group or no fish food entering the system you might need to supplement their feeding. They do great on a variety of high quality foods like cucumbers, zucchini, banana peel, strawberries, grapes and fish food. It helps to soften the fruits and veggies letting them way over rippern to the point of starting to break down. Experiment with different foods but remember a little goes a very long way! Start with thin slices of the fruit or veggie. If you throw a whole cucumber in your tank it will probably foul the water and kill the larger lifeforms.