Buy Bulk and Save. Why pay more for a fancy container when you can buy our high quality bulk Granular Ferric Oxide (GFO). The only difference between this and the name brand lines is the packaging. We will measure out the weight ordered using a Legal for Trade scale, place in a new poly bag and box it up for shipping. A quick rinse is needed before running the product in your system.

Granular Ferric Oxide (GFO) hydroxide granules with an extremely high capacity for adsorbing phosphate from saltwater and freshwater aquariums. Also adsorbs silicate, and does not release adsorbed substances. Recommended to use in a flow reactor, but can use use a media bag and place in higher flow area of sump or overflows.