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Swimming pool maintenance - An Overview

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Launched inside the early 1900s was An additional type of sand filter – the 'Rapid Sand' filter, whereby water was pumped in the prime of a large quantity tank (three' 0" or maybe more dice) (1 cubic lawn/200US gal/170UK gal/770 liters) containing filter quality sand and returning on the pool https://directory-engine.com/listings13047784/a-review-of-swimming-pool-maintenance

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