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A properly maintained pool is one that is visually and biologically cleans. If the chlorine and PH levels are maintained, bacteria and algae will be killed and the pool will be biologically safe. Filtration is mechanical process of removing insoluble matter from swimming pool water. Pool water carrying particulate matter, solids and debris is passed through filtering media that allow clear water to return to the pool. Water clarity is important for appearance, hygiene and safety.
The water naturally contains dissolved and undissolved impurities. Undissolved impurities of water and precipitate sludge can be removed with the mostly popular and basic treatment of filtration. Various types of AST filtration plants are available for different type of impurities to be removed with different flow rate.
AST filters are made from FRP closed vessel incorporating frontal piping fitted with valves and are operated under pressure. The water is passed through the filter from different grade of filter media, where unwanted impurities are left behind at the filter bed. Filter have back flushing arrangement, which very easily flushes away the deposited impurity at filter bed to cleans the filter bed, thus reverse flow of water flushes away the impurities deposited at filter bed.