PhytaGen N1

Tax included

Nitrogen supplement for planted aquaria

In stock

  • Secure purchases; protected by SSL/TLS protocol Secure purchases; protected by SSL/TLS protocol
  • Fast shipment with express courier Fast shipment with express courier
  • Product can be returned (read our return policy) Product can be returned (read our return policy)

PhytaGen N1 is a Nitrogen mineral supplement for aquaria.

The use of PhytaGen N1 is advisable in the cultivation of fast-growing aquatic plants and / or where their nitrogen needs can not be guaranteed by the organic substances introduced by other routes (eg through the bottom or the introduction of feed for fish).

With PhytaGen N1 Nitrogen is supplied predominantly in oxidized form (Anion Nitrate: NO3-); but there is also a minority share in reduced form (Cation Ammonium: NH4+).
The reduced quota provides Ammonium in an easily assimilable form from plants and immediately available for their metabolism and at the same time nourishes the nitrifying bacterial flora responsible for the nitrogen cycle, helping to maintain the biological balance of the aquarium.
The part eventually transformed by the bacteria will eventually return to the circulation, remaining at the disposal of the plants as Nitrate.

PhytaGen N1 does not contain any forms of Nitrogen that can create problems for the aquarium ecosystem, such as organic forms such as Urea or Amino Acids.

PhytaGen N1 does not cause accumulations of Potassium in the tank, since the Nitrogen present is not simply balanced / only by Potassium, but rather by a mix of Cations containing Potassium, Calcium and Magnesium in perfectly physiological quantities for aquatic plants.

In this way all the components of PhytaGen N1 are absorbed and used by the plants, without leaving in the tank quantities of residual elements that can alter the ionic balance of the water, favor the accumulation of Potassium and increase the Conductivity.

In order to allow the best development of plants, it is important to highlight how Nitrogen and Phosphorus should always be present in water in a correct reciprocal relationship (see below in the directions of use).
Since however there may be cases of altered balance between these two elements in the tank and consequent need to dose them separately, alxyon has preferred to provide separate nitrogen and phosphorus supplements.


PhytaGen N1 is highly concentrated and contains 33885 mg/l of nitrogen.
For ease of understanding we emphasize that this is the same amount of nitrogen present in 150000 mg/l (150 grams/liter) of nitrates (NO3-).

As mentioned, however, NO3- is not the only source of nitrogen supplied, as this is as follows:

• 31626 mg / l of Nitrate Nitrogen (equivalent to 140000 mg/l of anion Nitrate (NO3-).
• 2270 mg / l of Ammoniacal Nitrogen (from 2920 mg/l of NH4+).
This quantity is equal to that present in 10000 mg/l of NO3-



Molto efficace sono soddisfatto


Una marcia in più

Strabiliante integratore di azotati, il composto è bilanciato ottimamente e integra l'azoto così come lo preferiscono le piante d'acquario

We recommend the use of PhytaGen S1 Planta at the dosage of 6 grams (one measuring spoon, included in the package) for every 20 liters of deionized water.

With this dosage, the remineralized water has the following values:

Total hardness = 7 dGH (German degrees of total hardness)
Alkalinity = 4 dKH (German degrees of carbonate hardness)
Conductivity = 380 μS/cm (Siemens micro on centimeter)

Potassium = 39.2 mg/l
Calcium = 35.2 mg/l
Magnesium = 9.3 mg/l
Sodium = 0 mg / l
Bicarbonates = 87.8 mg/l
Sulfur = 30.6 mg/l (Sulfates = 91.8 mg/l)
Chlorides = 6.2 mg/l

These dosage and the values ​​of GH, KH, Conductivity, quantity and ion ratios that derive from them are, based on the experience of Alxyon, ideal for a planted aquarium.

In order to achieve the expected results, however, it is necessary, after the first intake, to maintain these values ​​by balancing the consumption of ions by the plants.

To do this it is necessary to carry out regular water changes.
In particular, it is recommended to change 20-25% of aquarium water weekly.

During water changes, it is advisable to introduce new water into the aquarium only after it has been remineralized in a separate container.
For this purpose, the desired amount of S1 Planta is introduced into the container containing the water in the gearbox and the water is moved until a complete dissolution or a homogeneous suspension is obtained.
The water obtained in the aquarium can then be poured into a strongly moving area (eg at the filter outlet).

A slight residual turbidity should be considered normal and, at the recommended dosages, the aquarium water returns limpid in short (depending on the amount of dissolved CO2).

For animal hosts that want water with higher pH, hardness or conductivity, the dosage of S1 Planta can be increased.

For example, at a dosage of 5 grams, every 10 liters of deionized water are obtained:

Total hardness = 11.7 dGH (German degrees of total hardness)
Alkalinity = 6.7 dKH (German degrees of carbonate hardness)
Conductivity = 633 μS / cm (Siemens micro on centimeter)

With the same amount of dissolved CO2 in water, the pH will also rise due to the increased level of Alkalinity.

Alxyon, anyhow, formulates various types of remineralizing salts, specific for animal guests with special needs.
In these cases it is therefore good to check whether there are dedicated Alxyon salts and to use the most suitable.
For example:
S2 Amazonas: Specific salts for Discus and other oligotrophic water fishes
S3 Malawi: Specific salts for the cichlids of Lake Malawi
S4 Tanganyika: Specific salts for cichlids of Lake Tanganyika

Please find hereafter a dosage calculator to be used on mobile phones.
Just select the relevant product (M1, M2, N1, P1, S1) from the top tabs, insert the data requested and the program will calculate the amount of product to be dosed.

What is the optimal Nitrogen concentration in aquarium?

This question can not have a unequivocal answer.
As we already detailed in the tab regarding the usage, this depends on the plant mass present and its growth rate.

The effect is influenced by various factors, such as nutritional status and light irradiation.

In general, the suggestion is to follow the dosages of nitrate concentrations from about 5 mg/l for a low VM (vegetal metabolism) up to about 15 mg/l for aquaria with a very high VM, and in any case without exceeding 20 mg/l for a single administration.

All of this, always trying to keep a good ratio to Phosphorus, as detailed in the technical notes, regarding the description of the "Redfield Ratio".

Which forms of Nitrogen should be used?

As mentioned, Nitrogen is available in several forms.
Among the most common, we can find:

• Nitrates
• Ammonium
• Urea
• Amino Acids, Peptides, Proteins
• Other ammonium compounds

As said in general, plants prefer Nitrogen in reduced form (Ammonium), since they can use it directly for the internal production of aminoacids and proteins.
By doing so, they do not need to waste energy for converting Nitrates by reducing them to Ammonium.

However, it is not possible to supply Nitrogen to plants exclusively in the form of Ammonium.
This is due to the fact that it is necessary to maintain a correct internal equilibrium, and because a massive dosage in aquarium of ammonia nitrogen would create imbalances and probable algal explosions.

When in the tank there are not only plants, but also delicate aquatic organisms (fish, invertebrates, etc.), the Ammonium can only be supplied in quantities sufficiently low to protect them from any toxicity.

Urea is used as a reduced nitrogen because in water it splits freeing Ammonium.
Because of this it brings with it the toxicity problems related to the administration of Inorganic Ammonium.
Moreover, Urea, in order to be used inside the plants, must also be converted into Ammonium and to do this a nickel-based enzyme is necessary.
At this point the nickel, although required in very low quantities, should be supplied from the outside.

Furthermore, Urea, as an organic compound, provides a major stimulus to algal growth, so it is preferable not to use it in the aquarium.

Considerations analogous to those regarding Urea are valid for the Nitrogen coming from Amino Acids.
Amino acids do not carry the problems related to ammonium / ammonia toxicity but, like Urea, do promote algal growth quite a lot.

As mentioned, PhytaGen N1 provides Nitrogen in the two inorganic oxidized forms, with the oxidized form (Nitrate) to a predominant extent by virtue of its very low toxicity and with a small amount of reduced Nitrogen (Ammonium) such as not to be harmful, in the normal dosage ranges of the product, even to the most delicate organisms, but such as to be a stimulus to the development of the plants and to the nitrifying bacterial flora (from which the stability of the aquarium ecosystem depends intimately).

You might also like

PhytaGen S1 Planta

PhytaGen S1 Planta

3 Review(s)
From Price €11.90
Mineral salt mix for the remineralization of deionized water in planted aquaria
PhytaGen M1

PhytaGen M1

Price €16.90
Complete Trace Elements supplement for planted aquaria with medium-low Vegetal Metabolism
PhytaGen M2

PhytaGen M2

4 Review(s)
Price €19.90
Advanced Trace Elements supplement for planted aquaria with high Vegetal Metabolism.

Related products

(There is 1 other product in the same category)