Seachem De Nitrate

9 reviews

De Nitrate is an efficient filter medium that is perfect for anaeronic nitrate removal, aiding the nitrogen cycle in ridding your tank of it's own natural waste so it doesn't poison itself.


  • De Nitrate 250ml
    code: 136 In stock Only 4 left in stock
  • De Nitrate 500ml
    code: 133 In stock Only 5 left in stock
  • De Nitrate 1L
    code: 137 In stock Only 4 left in stock

Product Information

Seachem De Nitrate will work tirelessly to remove algae causing nitrates from your aquarium. As it has a large surface area and a porous surface, the media supports a large bacteria growth which helps eradicate nitrates.

The media works by providing both aerobic nitrification (bacteria that oxidises nitrates) at the surface and then anaerobic de-nitrification as it passes through the media core, this means that nitrates are trapped and then starved of oxygen, destroying it as it develops. This process is similar to how corals and coralline algae take nutrients from the water for calcification.

De Nitrate is a great biological filter medium, and works well in drip trays, canister filters, sumps and box filters. So it is sure to be useful, whatever type of aquarium and filtration system you have. Directions:

500ml of De Nitrate treats around 100 - 200 litres of water, depending on the initial nitrate level. If the nitrate level is above 20 mg/L, then bring it down with water changes before using the remover.


  • Rinse the product before use.
  • Place it in an area of high water flow, although not exceeding 200 lph, for best results.
  • After several days use, nitrate levels should drop. Use a test kit to determine that the product is working.

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