Simplicity GFO is sold in 1lb bags and is best used in a media reactor for maximum performance, which is the same for all granular ferric oxides.  GFO is used to remove phosphate from the water reducing algae growth and...

Media Filter Bags 2 Pack Media filter bags are great for putting carbon, GFO, and other medias inside your aquarium or sump. Boyd Chemi-bags - 2/pk 5 in x 11.5 in Information Double stitched nylon filter medium bags. For...

GFO Granular Ferric Oxide - 1 Pound Bulk The purpose of GFO is to inhibit algae growth by removing phosphates from the aquarium. Maintaining low phosphate levels will help prevent algae outbreaks and control growth. Serious...

The Reef Octopus MF300B media reactor includes everything you need, even the feed pump is included.  All you need for the Octopus MF300B reactor is carbon, GFO, or any other types of media you wanna use on your aquarium...

The Reef Octopus MF800B media reactor includes everything you need, even the feed pump is included.  All you need for the Octopus MF800B reactor is carbon, GFO, or any other types of media you wanna use on your aquarium...

PhosBan 150gram Phosphate Removal Media PhosBan from Two Little Fishies is a favored chemical filter media because it will not leach substances back into your aquarium. Largest adsorption capacity of any phosphate filtering...

Two Little Fishies GFO/Phosban 150 Reactor   The Phosban Reactor 150™ has become a staple amongst most aquarists who keep SPS corals. So much so that you often see Phosban used interchangeably with the term GFO...

Our professional line media reactors are not only built to last but have the most very best filtration protection available. The two cone strainers on each end of the reactor prevents large course media from being passed...

Two Little Fishies GFO/Phosban 550 Media Reactor   The Phosban Reactor 550™ has become a staple amongst most aquarists who keep SPS corals. So much so that you often see Phosban used interchangeably with the term...