Legend Nitrogen NO3


Legend Nitrogen™

Nitrogen is one of the main three macronutrients (nitrogen, phosphorus, potassium: NPK) required by plants and can often become the limiting factor to growth in a flourishing system. Legend Nitrogen™ brings the important macronutrients nitrogen, potassium, magnesium and calcium into your tank. Your plants can draw on plentiful resources again and will thank you with lush growth. However, no free ammonia is released because the ammonium in Legend Nitrogen™ is complex and unavailable until utilized by the plants. Ammonium becomes available after the conversion of urea (carbamide). Legend Nitrogen™ also provides nitrate for those plants that can readily utilize nitrate as well. For maximum benefit, use Legend Phosphat™ and Legend Potassium™. Legend Nitrogen™ is safe for invertebrates such as shrimp.

Weekly water changes of 25% to 50% are recommendable. The dosage can be raised or lowered depending on your requirements. If your tank water shows high readings of phosphate from the start, this fertilizer is not suitable for your aquarium, though. It has been designed to prevent the accumulation of large concentrations of macronutrients. If high levels of phosphate occur, please reduce the dosage.

For maximum benefit, use with Legend Phosphat™ and Legend Potassium™


Sizes: 100 mL, 250 mL, 500 mL, 1 L, 5 L


2 ml Legend Nitrogen™ per 100 liters of tank water adds the following nutrients:


NO3                             1.00 mg/l

K                                  0.20 mg/l

Ca                                0.03 mg/l

Mg                               0.07 mg/l


Lots of light (>0.5 Watt per litre) + CO2    2 ml per day

Little light (<0.5 Watt per litre) + CO2       1 ml per day

No CO2 supply of 1–2 ml per week


This dosage suggestion is just a guideline. The dosage may have to be raised or lowered depending on the conditions in your tank in order to give you good results.


  • Do not allow the nitrate concentration to drop below 5 ppm
  • Note that in situations of denitrification, nitrate can drop to 0 ppm
  • Do not contaminate the solution with aquarium water
  • Do not ingest and keep out of reach of children and pets
  • Store at room temperature. Protect from light, heat and frost
  • For aquarium use only


Legend Nitrogen MSDS 20230622.pdf


Shrimp Friendly

Storage: at room temperature. Protect from frost and heat. Keep out of reach of children and pets.

Use: For fertilization of ornamental plants in an aquarium only.
See the pack for detailed dosage recommendations. Note: Official guidance recommendations take precedence.

Download Images





Nitrate NO3 fertilizer with extra potassium

Nitrate NO3 is an essential macronutrient

Aquatic plants finally can grow lushly again

Perfect for all levels of knowledge

Different blends of nitrogen sources