About: http://webisa.webdatacommons.org/439505258

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	Rock that is inert will not affect GH/KH/pH. But calcareous rock such as limestone, marble, dolomite, lava, as well as coral and shells, will raise the GH and thus the pH. Byron.
http://www.w3.org/ns/prov#wasQuotedFrom	tropicalfishkeeping.com