Seachem Flourish Nitrogen

Seachem Flourish Nitrogen

Seachem Flourish Nitrogen is a concentrated nitrogen supplement for planted freshwater aquariums, made for aquarists who want to support healthy aquatic plant growth. It supplies 15,000 mg/L of nitrogen from both nitrate and ammonium sources, helping address nitrogen as a potentially limiting macronutrient in a flourishing planted system.

Key Benefits

• Provides nitrogen in both nitrate and plant-preferred ammonium forms.
• Contains a concentrated 15,000 mg/L blend of nitrogen sources.
• The ammonium is complexed and unavailable until used by plants, so no free ammonia is released.
• Supplies nitrate for aquatic plants that readily use nitrate.
• Safe for aquarium invertebrates, including shrimp.
• Nitrogen is one of the three primary plant macronutrients alongside phosphorus and potassium (NPK).

How to Use

Add Seachem Flourish Nitrogen to your planted aquarium twice weekly or as needed in response to signs associated with nitrogen deficiency, such as stunted growth or chlorosis. For maximum benefit, use it alongside Seachem Flourish Phosphorus and Seachem Flourish Potassium.

Dosage

• Beginner dose: Use 2.5 mL (half a cap) for each 160 L (40 US gallons) twice a week.
• For smaller doses, each cap thread measures approximately 1 mL.
• The beginner dose raises nitrogen by the same degree as 1 mg/L nitrate.
• To target a specific nitrogen increase: 0.25vn=m, where v is aquarium volume in gallons, n is the desired nitrogen increase and m is the volume of product in mL.
• If using a nitrate-equivalent value for n, use 0.05 instead of 0.25 in the formula.
• Example: To raise 20 gallons by 0.20 mg/L nitrogen, dose 1 mL: 0.25 × 20 × 0.20 = 1 mL.

Suitable For

Freshwater planted aquariums, including planted tanks containing shrimp and other invertebrates. It is suited to aquariums where nitrogen needs to be supplemented as part of a balanced plant fertilisation routine.

Frequently Asked Questions

What does Seachem Flourish Nitrogen provide to aquarium plants?
It provides a 15,000 mg/L blend of nitrogen sources in nitrate and ammonium forms. Nitrogen is a primary NPK macronutrient required by aquatic plants.

How much Seachem Flourish Nitrogen should I use?
Use 2.5 mL for every 160 L (40 US gallons) twice weekly, or dose as needed based on signs of nitrogen deficiency.

Is Seachem Flourish Nitrogen safe for shrimp?
Yes. The product is safe for invertebrates such as shrimp.

Does this fertiliser release free ammonia into my aquarium?
No. Its ammonium is complexed and is unavailable until utilised by plants, so no free ammonia is released.

Can I use Flourish Nitrogen with other Seachem plant fertilisers?
Yes. For maximum benefit, use it with Seachem Flourish Phosphorus and Seachem Flourish Potassium.

How can I estimate nitrogen levels when using this product?
Because half of the nitrogen in Flourish Nitrogen is from nitrate, you can get a reasonable estimate of nitrogen levels by doubling a nitrate reading.

When can I expect delivery?

• Gauteng (Jhb/Pta) - 1-3 working days
• Nationwide (Cpt/Dbn+) - 2-5 working days
• Outlying Areas - 3-7 working days

All orders are sent via Economy Road, typically through Fastway or Internet Express Couriers*. Estimated timeframes are not guaranteed. Once the order is collected by the courier, we have no control over third-party logistics and cannot make any time promises.

If you prefer a faster 🚀 shipping option, we also offer The Courier Guy during checkout in the dropdown selection. Please note that this option is not free, and you must choose it to use it. Please pay careful attention to the cutoff times and delivery timeframe for these options during checkout.

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No more waiting at home or at work for your delivery. Simply choose a collection locker or pickup point and collect your order when it suits you.

Delivery times to lockers and pickup locations typically range from 2–7 working days, depending on your location.*

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Collection timeframes:

• Bob Box: Collect within 2 days of receiving your collection notification.
• PUDO Lockers: Collect within 36 hours of receiving your collection PIN or SMS notification.

If a PUDO parcel is not collected within 36 hours, it will automatically be transferred to the nearest PUDO Kiosk or Depot at no additional cost. The parcel will then be held there for approximately 2 days before being returned.

Please ensure you collect your parcel within the applicable collection period. Uncollected parcels will be returned to the sender, and additional shipping charges may apply should the order need to be resent.