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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	Purigen is also often effective in tannin removal in aquariums or ponds (that causes yellow water) when carbon and other products are not (especially when combined with Matrix).
http://www.w3.org/ns/prov#wasQuotedFrom	aquarium-pond-answers.com