About: http://webisa.webdatacommons.org/92838481

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	It also occurs from the breakdown of organics (waste) by bacteria, particularly in the substrate but also in the filter and elsewhere.
http://www.w3.org/ns/prov#wasQuotedFrom	tropicalfishkeeping.com