Polyvinyl chloride (PVC) was produced experimentally in the 19th century but did not become practical to manufacture until 1926, when Waldo Semon of BF Goodrich Co. developed a method to plasticize PVC, making it easier to process.
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In Osaka Prefecture, Japan, members of Acanthamoebidae (as well as Naegleria) were found in 68.7% of tap water samples taken, despite purification.
Prior to the launch, an article in The Grocer trade magazine had mentioned that the source of the Dasani brand water was in fact treated tap water from Sidcup, a suburban development in London.
Where tap water is chlorinated, it should be dechlorinated before use in an aquarium, since chlorine can harm aquatic life in the same way it kills micro-organisms.