About: http://webisa.webdatacommons.org/419065452

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	A tank is a closed in area so nitrates are bound to build up regardless of fish selection. 10% tank volume weekly or 20% tank volume bi-weekly is a good number to follow to change.
http://www.w3.org/ns/prov#wasQuotedFrom	tropicalfishkeeping.com