CO2 fertiliser system complete set with disposable CO2 cylinder for vigorous and beautiful aquarium plants

  • Ready-to-connect CO2 fertiliser system. Provides the ideal supply for all aquarium plants in freshwater aquariums from 40 to 300 l while preventing algae
  • Simple assembly: screw pressure reducer onto cylinder, connect hose with bubble counter/check valve and diffuser, set the bubble count - done
  • Disposable CO2 storage cylinder. No hose slippage thanks to hose screw connections, check valve prevents water from entering the cylinder
  • The correct CO2 concentration in the aquarium water is checked via the display of the CO2/pH permanent test included and can be readjusted if required
  • Package contents: 500 g disposable CO2 cylinder, pressure reducer, 3 m hose, bubble counter with check valve, ceramic diffuser, permanent test with reagents, 2x plant fertiliser 100 ml, 1x daily fertiliser 10 ml
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Price: 148,30 €
Recommended retail price incl. VAT
You can find this item in your specialist and online shop
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CO2 cylinder
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Product information

Nutrition for aquarium plants
Plants provide the aquarium with vital oxygen for your aquarium inhabitants, prevent algae growth, remove pollutants, provide hiding places and reduce pathogens. The JBL plant fertiliser system supplies the plants with the main nutrient CO2 through the water. The plants absorb this and convert it into sugar and oxygen in photosynthesis with the help of light.

Easy to install
The system comes completely ready to connect. Screw the pressure reducer onto the CO2 storage cylinder and connect it by hose to the bubble counter (incl. backflow protection) and then to the diffuser in the aquarium. CO2 thus enters the aquarium and is dissolved in the water with the help of the diffuser. The CO2 supply can be interrupted at night by the interposed solenoid valve (night switch-off not included). The CO2/pH Permanent Test permanently indicates the amount of CO2 dissolved in the water and can then be readjusted if necessary.

Thanks to the check valve no water can enter the cylinder. The capacity of a CO2 system depends on various factors. The carbonate hardness, the quantity and species of the plants and the strength of the water surface movement are decisive. A 500 g cylinder which is not switched off by a solenoid valve during the night lasts for about 4 months in its default setting.
The recyclable CO2 disposable cylinders can be purchased individually or in a cheaper 3-pack.

Conversion from disposable to reusable cylinders and vice versa:
All JBL CO2 pressurised gas cylinder systems are compatible with each other. With the reusable system (M system), the union nut of the pressure reducer can simply be unscrewed with an Allen key. The pressure reducer then fits the U system (disposable cylinders).
If you have a disposable system, you can make the pressure reducer suitable for refillable cylinders (M system) by screwing on the u-m adapter.



Art. no.:
EAN Code:
500 g
40-300 l
Volume packaging:
15.6 l
Gross weight:
3564 g
Net weight:
2824 g
Weight factor:
Packaging dimensions (l/h/w):
158/477/207 mm


Animal species: Arowana, Axolotl, Barbels, Bettas, Bichirs/reedfish, Blowfish, Catfish, Cichlids (South America), Crayfish, Danions, Discus, Dwarf shrimps, Flowerhorn, Goldfish, Gouramis, Guppy, Juvenile fish, Killifish, Livebearers, Loaches, Panchaxes, Rainbowfish, Snails, Spiny eels, Tetra, Veiltails, freshwater butterflyfish
Animal size: For all animal sizes
Animal age group: All aquarium fish
Volume habitat: 300 L
Material: Plastic (PC), metal (steel), metal (aluminium)
Colour: grey / black / transparent
Transport conditions: Protect from direct sunlight during storage and transport and ensure good ventilation.

Electronic label / illuminant

Mercury: No
Dimmable: No

Technical Data

capacity from - to:40-300l
Height:125 mm
Length:75 mm
Width:70 mm
Do you need a tool to assemble the pressure reducer?

No, a tool is not required and should not be used under any circumstances. The use of a tool can lead to damage. You can mount the pressure reducer on the CO2 cylinder with your hands. Turn only until you feel resistance and then turn about half a turn more. This way the pressure regulator fitting is hand-tight. A short hissing sound will be heard when attaching the fitting to disposable cylinders.

Is a tool needed to adjust the CO2 quantity?

No, a tool should never be used. The use of a tool can lead to damage. There is a thin spike at the tip of the needle valve. If the needle valve is closed clockwise and turned too tightly or with a tool, it may break off and damage the pressure regulator.

The pressure reducer cannot be removed

Your system is probably still under pressure. Close the cylinder valve and remove the CO2 hose from the pressure regulator fitting. Open the regulating screw and release the pressure still present in the pressure regulator until both pressure gauges show 0 bar. Loosen the connecting nut of the pressure regulator fitting from the cylinder valve.

May the JBL PROFLORA CO2 products only be used for the aquarium?

Yes, the JBL PROFLORA CO2 products are designed exclusively for use in the aquarium. The gas contained promotes plant growth and works with fine precision so that even the smallest quantities can be supplied to the aquarium. Constant operation and the safety of the fish are thus guaranteed.

Should I use several check valves on my CO2 installation?

True to the motto, better safe than sorry, some aquarists install several check valves in the same circuit. For example, if you use the JBL PROFLORA direct inline diffuser or the JBL PROFLORA CO2 Count Safe bubble counter, you already have an integrated check valve. If you also use a separate check valve (JBL PROFLORA SafeStop), there may be problems with the opening of the check valves. This effect can be observed if, after the night switch-off or interruption of the supply with the controller, the addition does not restart automatically. Please note that, depending on the working pressure and the number of bubbles, a few minutes may pass between the start of the supply and the visible entry of CO2 into the aquarium.
Each spring in a check valve needs a certain pressure to be opened. Several springs can therefore interfere with each other and, depending on the distance between the two check valves, reduce the pressure at the spring to such an extent that it remains closed. Therefore, please always use only one check valve for your CO2 installation.

Show more FAQs ...
Blog (opinions & experiences)

Perfect aquarium plant growth - very complicated or really simple?

"The fish excretion in the water fertilises the plants!" This is not wrong, but it is only part of the truth!

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How a CO2 fertiliser system works

With the help of a CO2 fertiliser system you can increase the CO2 content in your aquarium water and lower the pH value. You have the choice between a "Bio-CO2" system and a CO2 fertiliser system with a pressurised gas cylinder.

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What factors lead to perfect plant growth?

Vigorous and healthy plant growth in the aquarium is of course never based on just one factor. It is always the interplay of light, heat, fertiliser and the main nutrient carbon dioxide (CO2).

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My very personal opinion on the new JBL CO2 systems

As JBL's head of marketing, I was very curious to see what our development department would come up with to improve the existing CO2 systems.

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Why is CO2 such a good help when combating algae?

Algae are plants, but only very simple Algae are plants, but only very simple ones. CO2 fertilisation promotes the growth of the more complex plants and algae have no chance against them!

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Perfect plant growth in your aquarium with the JBL PROFLORA CO2 System

Carbon dioxide (CO2) is the main food for your aquarium plants. With the help of a CO2 system you supply your plants with enough CO2 so that they can grow vigorously and healthily.

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CO2, also called carbon dioxide, is the main nutrient for all plants.

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JBL’s new high-tech CO2 pressure reducer & new CO2 line

Sometimes new legislation is a good reason to rethink a concept. In many countries, sending CO2 cylinders is becoming a dangerous goods issue, and so the new JBL CO2 concept will also include a version ...

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Reference guide (Themeworld)


With the guarantee extension JBL GarantiePlus you secure your extra-long extended 4-year guarantee from the date of purchase for your JBL product. Do not miss out on your extended guarantee claim!

Plant growth

Are your aquarium plants growing as well you want? Here’s how to achieve perfect plant growth

Reducing problematic water values

How to lower critical water values.

Deficiency symptoms

Here’s how to prevent deficiency symptoms in fish and plants

Algae control

Here’s how to combat algae successfully and lastingly.

Plant care

What maintenance measures do your aquarium plants need?

Daily care

How much daily or weekly care is involved? What are the basic maintenance measures for your aquarium?


Why is CO2 so important for plant care? What benefits does CO2 fertilisation provide?


Why do aquarium plants need to be fertilised?

Plant species

Which plant species suit your aquarium? What demands do the individual species have?

Installation technical items

How and where in the aquarium do you fix and install technical items? Tips and tricks for the installation of all technical aquarium products


Which aquarium plants are best? What’s the best way to plant them?

CO2 plant fertilisation

How important is CO2 plant fertilisation? Why do your plants need additional CO2? How does a CO2 system work?

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Rocky reef aquarium type JBL Malawi Rocks®

The fish of Lake Malawi are as colourful as the fish in the coral reefs. This aquarium brings a bit of freshwater reef into your living room

Goldfish aquarium type JBL Goldfish Paradise®

Lively goldfish in the aquarium enhance any room perfectly! Invite some new flatmates into your home with this goldfish aquarium.


Additional product information and downloads

spare parts
Customer reviews


Overall rating: 5.0
14 public review(s) for this product.

0 Reviews

14 more reviews in other languages

14 Reviews in other languages

ShakaAnimalStudio - German

Meine Pflanzen sind jetzt eine Pracht, so wunderschön und kräftig waren bei mir noch nie irgendwelche pflanzen :)

C. Kischnick - German

Alles was eine gute CO2 Anlage braucht und noch mehr! Ich finde es super, dass auch sogar Dünger im Parkett dabei liegt, damit man so richtig starten kann. Außerdem kann man mit Produkten von JBL dieser Einweg Anlage zu einer Mehrweg Anlage umrüsten.

Youtubeur - French

Tres bon produit les plante pousse super bien

A.Q.U.A.R.I.S.T.I.Komet - German

Die Anlage ist super geeignet für Einsteiger, die noch nie eine Anlage benutz haben und diese ausprobieren möchten. Nur den Zylinder vernünftig einzustellen, dauert seine Zeit da man dort nicht so das Feingefühl hat. Allerdings sind ist die Anlage sowie das Zubehör alles in einer sehr guten Qualität und zusätzlich gibt es noch ein paar Dünger dazu die bei Benutzung der Anlage nicht fehlen dürfen. Alles in allem ein sehr gutes Produkt

_aquavision_ // pj.aquarist - German

Für mich als Anfänger vom Co2 im Becken absolut empfehlenswert. Einige Produkte sind dabei um zusätzlich zu düngen. Und natürlich was dazu gehören muss, Diffusor, Blasenzähler, Co2 Dauertest....

Leicht zu installieren und zu dosieren.

Absolut empfehlenswert.

Arturhrz - French

Super système, facile a monter et à régler , les plantes poussent très bien , aucune fuite

A.Q.U.A.R.I.S.T.I.Komet - German

Super Einsteigerset! Mit ein wenig frimel Arbeit wenn man den Co2 Auslass einstellen möchte, ansonsten gibt es keine Kritikpunkte

Aquamahh - French

One of the best Co2 systems I have tried, easy to install, the price is excellent and the quality is on point, I recommend ++++

Aquarium_Zimmer - German

Das JBL ProFlora CO2 Basic Set U ist ein guter Einstieg in die CO2-Düngung.

Die Anlage ist solide und die Zusammenstellung der Komponenten ist sehr gut durchdacht.

Es ist alles dabei um gleich loszulegen

aquarium.meer91 - German

Ein super Set zur Versorgung der Aquarienpflanzen.

Der Zusammenbau und die Inbetriebnahme ist kinderleicht.

Die Pflanzen wachsen sehr gut!

Aqua.nubia - German

Alles dabei was man braucht und super easy in der Handhabung. Bin rund um zufrieden

M. Karaahmetoglu - German

In bepflanzten Aquarien ist der Einsatz von Kohlendioxid sehr wichtig für ein gesünderes Pflanzenwachstum. Mit diesem Set kann ich sagen, dass ich alles Nötige habe, um dem Aquarium Kohlendioxid zuzuführen. Sie müssen nichts extra kaufen. Das Zubehör in der Box erfüllt alle Ihre Bedürfnisse. Ich kann sagen, dass ich sehr zufrieden bin.

pani_akwarystka - German

Wer ein rundum Sorglos-Paket sucht ist hier richtig.

Aufbauanleitung verständlich und einfach umzusetzen. Hochwertige Materialien. Die Feinjustierung der Bläschen geht auch sehr einfach und ist absolut lautlos. Einmal eingestellt läuft die Anlage absolut zuverlässig und meine Pflanzen sind zufrieden.

Ich wurde nicht enttäuscht. Alles funktionierte problemlos.

Bin sehr zufrieden und kann die CO2 Anlage bedenkenlos weiterempfehlen.

J. Mundt - German

für kleine aquarien eine ausreichende anlage. solange man mit der ausstattung klar kommt, eine super anlage.

JBL PROFLORA CO2 BASIC SET U - safety information in accordance with GHS

Signal word: Warning

Hazard symbol

  • GHS04

Risk phrase

H280: Contains gas under pressure; may explode if heated.

safety note

P410+P403: Protect from sunlight. Store in a well-ventilated place.

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