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Seachem Flourish Nitrogen 100ml

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Management number 234722251 Release Date 2026/07/02 List Price US$2.80 Model Number 234722251
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Flourish Nitrogen™ is a concentrated (15,000 mg/L) blend of nitrogen sources. Nitrogen is a key macronutrient alongside phosphorus and potassium (NPK) essential for plant health and frequently limits growth in thriving aquatic environments.

Seachem Flourish Nitrogen delivers nitrogen as both nitrate and the preferred ammonium form for plants. Importantly, it does not release free ammonia since the ammonium is complexed, making it inaccessible until absorbed by the plants.

Ammonium is released following the breakdown of urea (carbamide), while Flourish Nitrogen™ also supplies nitrate to support plants capable of efficiently using this form of nitrogen.

Flourish Nitrogen is safe for invertebrates such as shrimp.

 

Directions:

Beginner

Use 2.5 mL (half a cap) for each 160 L (40 US 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 1 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.



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