PhosBond - Phosphate Removal Media

Grouped product items
100 mL PhosBond - Phosphate Removal Media

SKU: 213178

In stock

$8.96 $8.96

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1 L PhosBond - Phosphate Removal Media

SKU: 213181

In stock

$36.29 $36.29

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4 L PhosBond - Phosphate Removal Media

SKU: 213182

In stock

$115.54 $115.54

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Seachem’s PhosBond revolutionizes phosphate and silicate removal through a synergistic fusion of granular ferric oxide (GFO) and aluminuum oxide. This synergistic blend combines the best of both types of phosphate removers to deliver a high capacity media that will rapidly remove phosphates and silicates. Its high porosity and surface area give it a large binding capacity, while its physical strength and integrity assures that it will not break down from mechanical stress, making it a perfect media for operating in media reactors.



  • Rapidly removes phosphate & silicate
  • Ferric oxide coated aluminum oxide phosphate adsorber
  • High porosity and surface area give it a large binding capacity


Available in Six Sizes

  • 100 mL
  • 250 mL
  • 500 mL
  • 1 Liter
  • 4 Liters
  • 20 Liters



  • For best results, PhosBond should be rinsed before use and placed so as to maximize the flow of water through it but not so that it tumbles against itself in flow. It may be used in a canister filter, media chamber, box filter, or any high flow area of a trickle filter.
  • Place in a media reactor or filter media bag.
  • Use 60 mL (1/4 cup) for every 200 L (50 US gallons) saltwater or 400 L (100 US gallons) freshwater.
  • Leave product in place for 4 days, then test phosphate or silicate concentrations.
  • If the concentration of the component you are trying to decrease has not dropped to around 0.02 mg/L, then replace the PhosBond, otherwise leave in place until levels begin to climb again.
  • As long as concentrations remain under control, the product is not exhausted. Over treating is not recommended. PhosBond is not an exchange resin and does not release anything into the water. It does not leach phosphate or silicate back into the water and may be removed, dried, and returned to service until exhausted. Continuous use of small quantities is better than intermittent use of larger quantities.
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Product Questions

Does the 100ml come in a bag like it does with seachems 100ml purigen. Wasn't sure and just wanted to check before ordering. It also would help me in deciding if I should just go with the 250 if they both come unbagged.
Question by: Mike on Jan 11, 2022, 2:30 PM
This product does not come in a media bag.
Answer by: Matt Lucero (BRS Staff) on Jan 13, 2022, 12:40 PM
Is this the same thing as Seachem's purigen? I bought a media container from InTank and they recommended chemi pure elite and seachems purigen. I've used it ever since but wasn't sure if there's a big difference. Thanks for any insight.
Question by: Michael K Horan on Dec 31, 2021, 10:09 PM
PhosBond by Seachem is a blended mix of both Granular Ferric Oxide and Aluminum Oxide that removes Phosphates from the water. While the Aluminum Oxide removes phosphates more rapidly, it also is used up more rapidly, and the GFO is a slower use type media for longer term removal. This media is good for removing phosphates fast and longer term because it is a blended media. Seachem Purigen on the other hand is a resin based media designed to remove organic waste from the water column. Phosbond is not regenerable in nature, but the Purigen is if you follow the regeneration instructions included with the media.
Answer by: Rick Pucciarella (BRS Staff) on Feb 4, 2022, 12:34 PM