About: http://webisa.webdatacommons.org/24802339

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Some of the variables to keep in mind when testing your pool water for chemical imbalances are pH, total alkalinity, calcium hardness, and trace metals such as iron or copper.
http://www.w3.org/ns/prov#wasQuotedFrom	doheny.com