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    YFS Bulk GFO Granular Ferric Oxide is a natural phosphate-removing media commonly used in aquariums. GFO works in all types of saltwater and freshwater aquariums. Used to help control algae outbreaks. Can be used in either a media bag or media reactors.

    In granular form appx. 1/4" in size Removes phosphates

    The one pound size is packaged in a resealable standup pouch. The 5, 10 and 15 pound sizes are packaged in a bulk plastic bag.