About: http://webisa.webdatacommons.org/428471948

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	However, with a daily hardness testing you can get an idea of long it takes for the carbonates and other buffering ions in your water to be depleted, at which point the pH will begin to swing.
http://www.w3.org/ns/prov#wasQuotedFrom	tropicalfishkeeping.com