Seachem Phosfiltrum Granular Ferric Oxide (GFO)
Phosfiltrum is a high-density GFO that will rapidly remove phosphates and silicates from both freshwater and saltwater. It is specially formulated to prevent releasing them back into your aquarium. The product is much harder, and much more durable than other GFOs available, therefore it will not disintegrate into fine particles in your tank. It has the highest binding capacity of any known phosphate remover, so it will last much longer before needing replacement.
Removing phosphates from your aquarium will inhibit algae growth and control outbreaks.
Place the media in a high-flow area of the tank or in the sump to achieve the maximum flow through the media.
