Seachem PhosNet – High-Capacity Granular Ferric Oxide (GFO)

Seachem PhosNet is a high-porosity, high-capacity granular ferric oxide (GFO) specifically engineered to rapidly remove phosphate and silicate from both freshwater and marine aquariums. By utilizing a high-surface-area synthetic GFO, PhosNet provides a more efficient and cleaner solution for nutrient control compared to traditional phosphate removers. It is an essential tool for reef hobbyists looking to prevent nuisance algae growth and promote optimal coral calcification.

Rapid Phosphate & Silicate Sequestration

PhosNet offers a superior bonding capacity to ensure your aquarium water remains low in growth-limiting nutrients.

High Binding Affinity: Effectively strips phosphates and silicates from the water column before they can be utilized by nuisance algae.
Lowest Dust Content: Engineered to be much harder and less brittle than standard GFO, resulting in significantly less fine dust entering your aquarium.
Stronger Absorption: Offers a higher capacity per gram than most competing GFO products, meaning you use less media for the same result.
Safe for Livestock: Completely inert and safe for all fish, corals, and invertebrates; it will not leach captured nutrients back into the water.
Versatile Application: Ideal for use in media reactors, canister filters, or placed in a high-flow area within a fine-mesh filter bag.

FAQ Section: Common Questions

How much PhosNet should I use? For best results, use 50 g (1/2 cup) for every 200 L (50 US gallons) of saltwater, or every 400 L (100 US gallons) of freshwater.
How long does PhosNet last? The lifespan depends on the initial phosphate levels in your tank. It should be left in place until phosphate levels begin to rise, at which point the media is exhausted and should be replaced.
Do I need to rinse it before use? Yes, PhosNet should be briefly rinsed in freshwater to remove any fine particles generated during shipping before being added to your filtration system.

Related Products

Seachem The Bag: A 180-micron weld-sealed filter bag perfectly sized to hold PhosNet without allowing fine granules to escape.

https://petstore.ae/collections/seachem-products/products/the-bag-aquarium-filter-bag-seachem?_pos=1&_sid=b0d5393d2&_ss=r

Seachem Matrix: Combine PhosNet with this high-capacity bio-media to manage both chemical and biological nutrient export simultaneously.

https://petstore.ae/collections/seachem-products/products/matrix-aquarium-biological-filter-media-seachem?_pos=5&_sid=4ac3ae6e7&_ss=r

Salifert Phosphate (PO4) Test Kit: The essential tool to monitor your levels and determine exactly when your PhosNet media has reached exhaustion.

https://petstore.ae/collections/test-kits/products/phosphate-test-kit-salifert?_pos=1&_sid=592df9eea&_ss=r

Seachem PhosNet | High-Capacity GFO Phosphate Remover

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