JBL ProScape P Macroelements

JBL ProScape P Macroelements

  • Phosphate fertiliser
  • Recommended level: 0,1 - 1,5 mg/l
  • The dosage can be checked with the JBL phosphate test
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Healthy plant growth is based on the following three main pillars: A supply of light, a supply of CO2 and an adequate/optimal supply of mineral nutrients. The supply of nutrients is described by Liebig’s Law of the Minimum. According to this concept, the nutrient which is available in the minimum amount limits the growth of plants regardless of whether it is a microelement or a macroelement. Microelements are trace elements which plants need in small amounts, whereas macroelements are used for growth in larger amounts.

In a well-planted aquarium, both microelements and macroelements are consumed in large amounts. Particularly when the fish population is small, the microelements, as well as the macroelements of nitrogen, phosphorous and potassium, quickly drop down to the minimum.

The macroelements can easily be supplied by using JBL ProScape NPK Macroelements or by adding each of the individual components, nitrogen, phosphorous, potassium and magnesium, separately. If the latter procedure is selected, it is recommended to check the water values with the JBL Test Set each time.

Phosphorus in the form of phosphates plays an essential role in all vital functions. For example, phosphates play a key role in over-all energy metabolism, as well as in the structure of the hereditary information of all organisms.

Whereas it is more common to find an excess of phosphates in aquariums with larger fish populations which, in turn, can lead to algae growth, phosphates are often in scarce supply in planted aquariums due to consumption by the aquatic plants. This limits growth in the tank.

As the concentrations of phosphates in the drinking waters usually used in aquariums vary considerably, depending on the water supplier, it is advisable to use JBL PO4 Test Set sensitive to determine the current phosphate concentration of the water used before adding the JBL ProScape P Macroelements fertiliser.

JBL ProScape P Macroelements supplies tank water with phosphorous in the form of water-soluble phosphates. As a result, the aquatic plants obtain the supply of phosphate they require. Potassium is also added to the water at the same time.


  • For the fertilizing of plants in aquariums with low or no fish population, such as nano aquariums and aquascaping aquariums. Standard dosage in aquariums with CO2 fertilization and a lot of light: 2 ml/100 l.
  • Recommended level: 0.1 – 1.5 mg/l.
  • The dosage can be checked with the JBL phosphate test.
  • Contains additional plant-available potassium.
  • Contains a 2 ml dispenser.


Dosage per 100 Liter
Well lit tank (1 Watt per Liter) + CO2 2 ml daily
Without CO2 2 ml per week

The normal dosage is 2 ml / 100 l of water for a very well-lit tank with >= 1 W / l of illumination and 1 ml/100 l of water for a tank that is not as well lit. The supply of carbon dioxide must also be considered.

The above table shows recommended fertiliser concentrations according to the general conditions of the aquarium.

As actual precise consumption cannot be predicted, we recommend regularly checking the phosphate level with the JBL PO4 Test Set sensitive, especially prior to each follow-up dose.

2 ml JBL – ProScape P Macroelements in 100 l yelds a concentration of:
PO4 0,1 mg/l
K 0,17 mg/l



JBL is a traditional German company with a very wide range of products for aquarists. From high-quality fish and shrimp food to external filters and water plant fertiliser, JBL offers a wide selection for aquarium enthusiasts.

JBL's research and development constantly brings new, innovative products onto the market. Whether aquascape, fish aquarium, shrimp tank with a scurry factor or a pure water plant aquarium in Holland style, JBL offers suitable aids for set-up and maintenance for all these directions.

General information

Item no.
EAN 4014162211187
Weight 0,38 kg
Shipping weight 0,50 kg

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