About: http://webisa.webdatacommons.org/345332628

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	Byron 04-28-2013 05:38 PM I can not tell from the photo if there are two layers to the substrate, such as is a layer of soil at the bottom with a layer of gravel over it.
http://www.w3.org/ns/prov#wasQuotedFrom	tropicalfishkeeping.com