About: http://webisa.webdatacommons.org/31101395

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	Sand is the best for them but if its filthy it is can be a problem just like the dirty gravel.
http://www.w3.org/ns/prov#wasQuotedFrom	tropicalfishkeeping.com