Construction methods for private pools vary greatly. The main types of in-ground pools are concrete, vinyl liner, and fiberglass. Above-ground pools (also called "on-ground pools") are usually cheaper to build. They are especially popular in places where ground freezing makes excavation difficult and threatens damage to the pool structure.
Swimming pool water must be maintained at low levels of bacteria and viruses to prevent the spread of diseases and pathogens between users. Bacteria, algae and insect larvae can also enter the pool without help from swimmers, and cause disease to swimmers and other people in the area.
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In Ground Swimming Pools In ground swimming pools that you can actually build and install yourself.