About: http://webisa.webdatacommons.org/105950413

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	Most maintain that along with harmful toxins like heavy metals, ammonia, nitrites and nitrates, chemical media including carbon also removes nutrients.
http://www.w3.org/ns/prov#wasQuotedFrom	tropicalfishkeeping.com