A swimming pool is any type of tank or container that holds water in which people can swim. These pools can range from portable, child-sized splash pads to major landscape features that may cost tens of thousands of dollars or more. Budget, lot size and local codes all influence what type of pool is appropriate for a given residential landscape.
A pool can be made from a variety of materials including concrete, vinyl, fiberglass and steel. Fiberglass pools are pre-molded and come in many sizes and shapes. These are often easier to install than other types of pools, since there is no need to dig a hole and construct a frame before the pool can be lowered into place. They may be installed in-ground or above ground.
Pools can be used for recreation, exercise and competition. They can be designed for recreational swimming, diving, water polo, canoe polo and other aquatic sports. They can also be used for specialist activities such as training in water-ditching survival techniques for aircraft and submarine crews and astronaut training.
Swimming pools require extensive sanitization to prevent the proliferation of bacteria and other pathogens that can cause illness. Biological control is achieved with mechanical sand filters and disinfectants. Chemical controls include pH, total alkalinity and calcium hardness.
Drowning is a serious threat to children, so most pools are required to be fenced to restrict unauthorized access. Some pools are protected by security systems with window, door and pool alarms. In addition, all children should be taught to swim and someone in the family should be trained in CPR and first aid. In addition, everyone should shower before and after using a swimming pool to reduce the risk of transmitting germs into the water. It is also recommended that swimmers not use the same bathing suit for multiple swims as this can spread skin and respiratory viruses.
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