About: http://webisa.webdatacommons.org/205829012

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	Very soft water will have low levels of these dissolved minerals.For those who really want to know, these materials consist mainly of calcium and magnesium ions, bicarbonates and sulfates.
http://www.w3.org/ns/prov#wasQuotedFrom	all-about-tropical-fish.com