About: http://webisa.webdatacommons.org/207570308

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	No Riaan your tank is not connected to earth my friend, so in short - hence the requirement to have some sort of grounding done, if not you become the conductor between live and earth instead of the earthing probe.
http://www.w3.org/ns/prov#wasQuotedFrom	marineaquariumsa.com