SKU: 67007294515

Seachem Reef Nitrogen

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Description

Seachem Reef NitrogenSeachem Reef Nitrogen Seachem Reef Nitrogen is a nitrogen supplement for reef aquariums that provides nitrogen in a fully testable form to support the metabolic processes, protein synthesis, and growth of corals and macroalgae. Nitrogen Supplement for the Reef Aquarium Provides Nitrogen in a fully testable form Concentrated 25,000 mg L Nitrogen (110,750 mg L Nitrate) Nitrogen is an essential element required in metabolic processes, protein synthesis,

Seachem Reef Nitrogen

Seachem Reef Nitrogen is a nitrogen supplement for reef aquariums that provides nitrogen in a fully testable form to support the metabolic processes, protein synthesis, and growth of corals and macroalgae.

  • Nitrogen Supplement for the Reef Aquarium
  • Provides Nitrogen in a fully testable form
  • Concentrated 25,000 mg/L Nitrogen (110,750 mg/L Nitrate)

Nitrogen is an essential element required in metabolic processes, protein synthesis, and growth of corals and macroalgae. Research suggests a tightly closed nitrogen cycle on reefs where concentrations are higher in micro-zones near the corals (Radecker 2015, Wiedenmann, 2023) than in the surrounding water. 

It is important to maintain nitrogen levels along with phosphorus levels in order to allow for optimal growth and coloration of corals and macroalgae.

Supplementing with inorganic nitrogen provides a targeted means of increasing nitrogen without also adding phosphate or dissolved organics. A typical nitrate test will show all forms of nitrogen being added by Reef Nitrogen™. Reef Nitrogen™ is ideally suited for use with an aquavitro® sentia™ dose doser to maintain nitrogen at consistent concentration based on your aquarium's unique demand. Reef Nitrogen™ is easily dosed manually as well. Ideal nitrogen levels will vary but generally range from 1 – 2 mg/L (4.4 – 8.9 mg/L nitrate). Use Seachem’s Reef Phosphorus™ to achieve a balance of nitrogen to phosphorus levels for optimal results.

Directions:
Beginner
Use 1 cap (5 mL) per 160 liters (40 US gallons) twice a week or as needed to maintain desired nitrate levels. For new aquariums or aquariums with low populations of coral use ¼ to ½ dose initially and gradually increase as necessary.

Advanced
The beginner dose raises nitrogen by 0.78 mg/L or approximately 3.5 mg/L nitrate. To target a specific nitrate level, increase dose according to the following formula: 0.009vn=m where v= volume of tank in liters, n=desired nitrate increase, and m= volume of product to use in mL. For example, to raise 160 liters by 3.5 mg/L nitrate you would use 0.009*160*3.5 resulting in 5 mL to dose. For reference: 1 US gallon=3.8 L.

Shipping Notes
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 67007294515

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★★★★★ 4
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Reviewed in the United States on May 21, 2026
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Material Type: Recycled Polyester, Color: Port Stripe, Size: X-Large
I really like this polo. I've been wearing it once a week or every other week since November. Its very comfortable and breathable. This polo feels like it should last a while. The fit is good. I typcally wear XL and this XL fits great. I've pruchased it in both burgundy and black so far. I definitely recommend this shirt. For work or casual wear, this will look good.
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Reviewed in the United States on January 11, 2026
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Tech Dad
Natrona Heights, US
★★★★★ 5
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Material Type: Recycled Polyester, Color: Blue, Size: X-Large
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Reviewed in the United States on May 29, 2022
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Espresso
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