When you buy a pool, plan on spending lots of time on maintenance. In colder climates, you have to prepare the pool for winter and get it ready for swimming in the spring. You also have to constantly monitor the quality of the water, adding chemicals as needed so swimmers have a clean, refreshing experience. Keep the pool clean to ease strain on the filter. If you're not into spending lots of time taking care of the pool, hire someone to do the work in O Fallon, Missouri. Especially with an in-ground pool, you'll want regular visits year-round for cleaning and to ensure that the pool is stable during the dormant months.