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Flourish Nitrogen™ is a concentrated (15,000 mg/L) blend of nitrogen sources. It provides nitrogen in both the nitrate form and the plant-preferred ammonium form. However, no free ammonia is released because the ammonium in Flourish Nitrogen™ is complexed and unavailable until utilized by the plants. Flourish Nitrogen™ also provides nitrate for those plants that can readily utilize nitrate as well. For maximum benefit, use with Flourish Phosphorus™ and Flourish Potassium™.

Why It's Different

Unlike competing products, Flourish Nitrogen™ is entirely phosphorus-free, making it possible to adjust the nitrogen level in an aquarium without affecting phosphorus levels. Directions BEGINNER: Use 2.5 mL (half a cap) for each 160 L (40 gallons*) twice a week or as needed in response to signs of nitrogen deficiency (e.g., stunted growth, chlorosis). For smaller doses, please note that each cap thread is approximately 1 mL. EXPERT: The beginner dose raises nitrogen by the same degree that 1 mg/L nitrate would. This dose is sufficient to provide approximately 4 g of growth (dry) or about 20 g (hydrated) over a one-month period (assuming all other necessary nutrients are provided). For increased growth, use proportionately more. To target a specific nitrogen increase, dose according to the following formula: 0.25vn=m, where v= volume of tank in gallons*, n=desired nitrogen increase (if using a “nitrate equivalent” value for “n” then use a factor of 0.05 instead of 0.25 in the formula) and m=volume of product to use in mL. For example, to raise 20 gallons* by 0.20 mg/L nitrogen, you would use: 0.25*20*0.20=1 mL. Because one-half of the nitrogen in Flourish Nitrogen™ is from nitrate, you can get a reasonable estimate of nitrogen levels by doubling a nitrate reading, or you can use Seachem’s MultiTest: Total Nitrogen™ (coming soon!) to accurately measure total nitrogen while distinguishing between nitrate, ammonia, and organic nitrogen.

Guaranteed Analysis: Total Nitrogen (N) 1.5%. Soluble Potash (K2O) 2.0%. Derived from: potassium nitrate, urea (iminium salt).

Seachem Flourish Nitrogen 2L

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Flourish Nitrogen™ is a concentrated (15,000 mg/L) blend of nitrogen sources. It provides nitrogen in both the nitrate form and the plant-preferred ammonium form. However, no free ammonia is released because the ammonium in Flourish Nitrogen™ is complexed and unavailable until utilized by the plants. Flourish Nitrogen™ also provides nitrate for those plants that can readily utilize nitrate as well. For maximum benefit, use with Flourish Phosphorus™ and Flourish Potassium™.

Why It's Different

Unlike competing products, Flourish Nitrogen™ is entirely phosphorus-free, making it possible to adjust the nitrogen level in an aquarium without affecting phosphorus levels. Directions BEGINNER: Use 2.5 mL (half a cap) for each 160 L (40 gallons*) twice a week or as needed in response to signs of nitrogen deficiency (e.g., stunted growth, chlorosis). For smaller doses, please note that each cap thread is approximately 1 mL. EXPERT: The beginner dose raises nitrogen by the same degree that 1 mg/L nitrate would. This dose is sufficient to provide approximately 4 g of growth (dry) or about 20 g (hydrated) over a one-month period (assuming all other necessary nutrients are provided). For increased growth, use proportionately more. To target a specific nitrogen increase, dose according to the following formula: 0.25vn=m, where v= volume of tank in gallons*, n=desired nitrogen increase (if using a “nitrate equivalent” value for “n” then use a factor of 0.05 instead of 0.25 in the formula) and m=volume of product to use in mL. For example, to raise 20 gallons* by 0.20 mg/L nitrogen, you would use: 0.25*20*0.20=1 mL. Because one-half of the nitrogen in Flourish Nitrogen™ is from nitrate, you can get a reasonable estimate of nitrogen levels by doubling a nitrate reading, or you can use Seachem’s MultiTest: Total Nitrogen™ (coming soon!) to accurately measure total nitrogen while distinguishing between nitrate, ammonia, and organic nitrogen.

Guaranteed Analysis: Total Nitrogen (N) 1.5%. Soluble Potash (K2O) 2.0%. Derived from: potassium nitrate, urea (iminium salt).


  • Brand: Seachem
  • UPC: 000116062800
  • Availability: 1
Seachem

$53.37

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FAQ (Frequently Asked Questions)

Yes, you can order fish along with dry goods. However, if the dry goods are heavy or bulky, it may be more cost-effective to place two separate orders. In that case, you could ship the dry goods using a slower, more affordable shipping option.

If your order has not shipped yet, you can email us your correct shipping address, and we will update it for you.

On weekdays, if we receive your order before 2 p.m., it will be shipped out the same day. Dry goods are shipped from Monday to Friday. Orders that include livestock are only shipped from Monday to Thursday to avoid transit over the weekend.

At checkout, you can leave your request in the comments box.

Our locker boxes are located in the foyer of our store at 230 Hanlon Creek Blvd, Unit 107, Guelph. The room is accessible from 9 a.m. to 9 p.m.