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Filtration and Sanitation
A properly sized filter and sanitation system is required to remove impurities (suspended material) from the pool water and to maintain clarity. Pool filters are diatomaceous earth (DE), sand, or cartridge. The filter media (the DE, sand, or cartridge) requires monthly, weekly, or daily cleaning depending on the type of media and variables such as bather load, landscaping, weather etc.
The sanitation of the pool water is accomplished with an injection of liquid chlorine via a peristaltic pump or restocking of dry chlorine products to an appropriate feeder. Gas chlorine is extremely dangerous and is not commonly used.
Common Problems with Filtration and Sanitation
Water clarity, dirt and/or sand passing back into the pool, and insufficient flow rate are problems that can occur. Even with routine cleaning, the media typically requires periodic replacement prior to the replacement of the entire filter tank. Valves to control water flow may need replacement. A number of parts such as gauges, meters, and fittings require more frequent replacement, especially on the automated chlorinating systems.
Solution
Residential pool owners should learn to test water quality and learn basic system operation or hire a pool service. At commercial pools, staff should check all equipment daily and chemical levels hourly to ensure proper operation. If any deficiencies with equipment, chemical levels, or clarity are identified, swimming should be prohibited. Contact your pool professional immediately. Solicit and consider suggestions for preventative maintenance, repair, or replacement of equipment.
Salt Water Pools
Automatic chlorine generators have gained popularity over the last few years. High purity salt is added directly to the pool water to establish a salt level between 2800 and 3600PPM. Fortunately this is below the threshold of what you can taste and it provides a soft, silky feel to the water. As filtered water passes through an electronic chlorine generator, electrolysis occurs. NaCl2 is separated in this process producing pure Cl2 (chlorine).
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