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The Swimming Pool maintenance Diaries

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Introduced In the early 1900s was A different variety of sand filter – the 'Speedy Sand' filter, whereby water was pumped to the top of a big quantity tank (3' 0" or even more dice) (1 cubic property/200US gal/170UK gal/770 liters) containing filter grade sand and returning into the pool https://emilio4gq52.blogmazing.com/31538194/not-known-factual-statements-about-swimming-pool-maintenance
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