Ferroxiphos G Granular Ferric Oxide For Phosphate Control 8oz, Brightwell Aquatics -- Granular Ferric Oxide for Phosphate Control in all Marine & Freshwater Aquaria Directly and efficiently removes reactive phosphate from aquarium water. Also removes silicate and phosphate-based organic material from aquarium water, often resulting in improved water clarity (particularly in aquaria with heavy bioloads).
PhosNet™ is a granular ferric oxide (GFO) with high porosity, high surface area and high binding capacity. It will rapidly remove phosphates and silicates from both freshwater and saltwater and will not release them back into your aquarium. It exhibits stronger binding than most competing products and consequently can reduce phosphates and silicates to very low levels. PhosNet™ also offers less dust and thus is easier to use than most competing GFO products.