Seachem De*nitrate Aquarium Filter Media, 100 mL Bag for Nitrate Control

Seachem De*nitrate is porous aquarium filter media designed to remove and control nitrate through anaerobic denitrification, with a 100 mL bagged quantity for marine or freshwater aquaria.

• High-porosity media for anaerobic denitrification — supports nitrate removal and control.
• For marine and freshwater aquaria — made for either type of aquarium.
• Porous inorganic pieces about 4 mm (0.16 in) in diameter — gives a clear media-size reference.
• No special denitrifying filter or culture feedings required — works without those additional requirements.
• Also helps control nitrite and ammonia and supports biological filtration — useful beyond nitrate management.
• 100 mL bagged quantity; one liter treats up to 100 gallons (378.5 L) — provides a stated treatment reference.

Seachem De*nitrate is made for aquarists managing nitrate as part of aquarium filtration, whether the setup contains marine or freshwater. Its role is biological: the porous media supports anaerobic denitrification, while also serving as support for the biological filter. It can be considered when nitrate control is the goal and additional help with nitrite or ammonia is useful. The stated treatment rate gives a reference for evaluating the amount of media needed.

How does Seachem De*nitrate support aquarium filtration?

Seachem De*nitrate removes and controls nitrate through anaerobic denitrification. Its high-porosity structure also makes it an effective support for the biological filter, and its surface-area characteristics are similar to Seachem Matrix. The media can also help control nitrite and ammonia, so its filtration role extends beyond nitrate alone.

• Designed for denitrification rather than requiring a dedicated denitrifying filter.
• Can be used as biological filter media as well as for nitrate control.
• Economical to use.

What size is the media, and what treatment reference is given?

Seachem De*nitrate consists of porous inorganic pieces about 4 mm (0.16 in) in diameter, and the bag contains 100 mL (3.38 US fl oz) of media. The stated rate is up to 100 gallons (378.5 L) treated per liter of media. This gives an aquarium-volume reference without changing the stated rate into a different package-size claim.

• Media form: porous inorganic solid.
• Package format: bagged, 100 mL.
• Treatment reference: up to 100 gallons per liter.

Is Seachem De*nitrate suitable for marine and freshwater aquariums?

Yes. Seachem De*nitrate is intended for use in both marine and freshwater aquaria. It does not require a special denitrifying filter or special culture feedings, so those are not prerequisites for using this media. Choose it for an aquarium where nitrate management and biological filtration support are relevant.

• Suitable for marine aquaria.
• Suitable for freshwater aquaria.
• No special culture feedings required.

Seachem De*nitrate suits aquarists looking for porous media that supports nitrate control and biological filtration in either marine or freshwater tanks, with additional help controlling nitrite and ammonia. Its 4 mm inorganic pieces, bagged 100 mL format, and stated treatment reference make its form and intended role straightforward to assess.

Read our guide: A beginner’s aquarium set-up checklist: from bowl to tank