Seachem Flourish Nitrogen

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Nitrogen supplement for the aquascaped aquarium

15,000 mg/L blend of nitrogen sources

Provides nitrogen in both the nitrate form and the ammonium form.

Aquatic plants use three main macro nutrients . All macro nutrients are usually added to aquariums as when the plants grow they strip the water of these nutrients so causing a shortage . If you then dont replace the macro nutrients into the water the plants will not thrive.

The three main macro nutrients required by plants are :




Seachem Flourish Nitrogen is a concentrated blend of nitrogen sources ( 15,000 mg/L) . This product introduces nitrogen in both the nitrate and the ammonium form ( plants prefer the ammonium form) . The great thing about this product is that no free ammonia is released into the aquarium because the ammonium in Seachem Flourish Nitrogen is complex and unavailable until utilized by the plants .

In order to keep all of your macro nutrients topped up we recommend that Seachem flourish nitrogen be used in conjunction with Seachem flourish potassium and Seachem flourish phosphorous


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.

Additional information


100ml, 250ml, 500ml, 2L, 4L


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