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Free delivery over €49 Ireland's pet value champions since 1993 30-day easy returns Free delivery over €49 Ireland's pet value champions since 1993 30-day easy returns Free delivery over €49 Ireland's pet value champions since 1993 30-day easy returns
Seachem

Seachem De*Nitrate 250ml

€9.99
de❊nitrate™ is an economical, natural, porous material with a pore distribution and geometry that promotes both aerobic nitrification within the first few millimetres of depth and anaerobic denitrification at the core. The material has a high surface area and supports a high density of bacteria. Although de❊nitrate™ has capacity to trap nitrate, this, as with other nitrate retaining materials, such as certain zeolites and synthetic resins, is quite limited and the primary mechanism of nitrate removal is anaerobic.

Removes nitrates, nitrites, ammonia, and organics
High porosity biological media
Pore size well suited for anaerobic bacteria
No danger of hydrogen sulfide production as with sulfur based media
Fast delivery available

How our price compares

  • ValuePet.ie Best price €9.99
  • pet**op.ie €17.50

Prices last checked 7 Sep 2026

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Description

Seachem De*nitrate removes nitrates, nitrites, ammonia, and organics from both fresh and marine water. The high porosity of De*nitrate supports the proliferation of both aerobic and anaerobic bacteria that further remove these toxic aquarium byproducts.

Even when exhausted as an organic adsorbent, de*nitrate continues to be an excellent support for the biological filter and does not have to be removed.

For best results, De*nitrate should be placed to assure the flow of water through it, such as in a canister filter, chemical filtration module, or box filter. Flow rate should not exceed 200 L (50 gallons) per hour. If higher flow rates are unavoidable, use Matrix or Pond Matrix. It is best to rinse off dust before use. Once de*nitrate has been in use for several days, nitrate concentrations should start to fall and level off gradually at a concentration of about 4-5 mg/L as nitrate. As long as nitrate concentrations remain under control, the product is not exhausted.

Each 500 mL of de*nitrate treats about 100-200 L (25-50 gallons), depending on initial nitrate concentration and the current biological load. Enough should be used to remove nitrate at a rate at least as fast as the rate of formation. If very high nitrates are initially present, they should be brought down to less than 20 mg/L with water changes.

Delivery & Returns

Free delivery on orders over €49. Orders are dispatched within 1–2 working days and typically arrive in 2–4 working days.

You can return unused items within 30 days for a full refund. See our Refund Policy for details.

Need help?

If you have a question about this product, call us on 089 245 9270 or email info@valuepet.ie.

Free delivery over €49
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