Pressure regulator with 2 pressure gauges for CO2 aquarium plant fertiliser systems

  • The pressure reducer reduces the cylinder pressure from approx. 60 bar (displayed on pressure gauge 1) to a low 1.2 bar working pressure (displayed on pressure gauge 2), so that the CO2 supply can be easily regulated
  • Screw the pressure reducer onto the pressurised CO2 cylinder and regulate the amount of CO2 added at the fine needle valve
  • The pressure reducer fits disposable CO2 cylinders (U system) and refillable cylinders (M system). By unscrewing the knurled nut (W21.8x1/14) with an Allen key, the pressure reducer fits the M10x1 thread of the disposable cylinders
  • Very high quality design: anodised aluminium, precisely CNC milled in titanium colour. Reliable sealing washer instead of O-ring
  • Package contents: 1 CO2 pressure reducer with 2 pressure gauges (for working & cylinder pressure) for refillable cylinders, with unscrewable adapter - then suitable for disposable CO2 cylinders
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Recommended retail price incl. VAT
Available from your specialist dealer.
Dealer close to you
You can find this article at your specialist shop and online
Product information

Easy to install
Screw the fitting onto the refillable or disposable CO2 cylinder. Connect the pressure reducer through a hose to a bubble counter/check valve and then to the diffuser/reactor in the aquarium. Adjust the number of CO2 bubbles on the fine needle valve. The CO2 permanent test provides feedback as to whether the amount of CO2 added is correct.

Safe to use
The pressure reducer is equipped with a safety relief valve, which provides a safe release of working pressure (in case it has been set too high) without damaging the fitting. The diaphragm control of the pressure reducer guarantees absolute reliability.

Tip: Can be easily converted to a disposable cylinder system by unscrewing the knurled union nut with an Allen key.

Function of the pressure reducer:
To reduce the pressure from the pressurised gas cylinder, a pressure reducer is screwed on. It reduces the 50-60 bar cylinder pressure to a working pressure of approx. 1.2 bar. These 1.2 bar are then dosed by a small handwheel (fine needle valve) so precisely that individual CO2 bubbles can be seen and counted in the bubble counter connected. The cylinder pressure and the working pressure are indicated on pressure gauges on this pressure reducer. These displays are not strictly necessary, as - unlike with diving cylinders with compressed air - the cylinder pressure does not slowly drop, and you do not need to be warned when the cylinder is running low. Instead, the pressure remains at its maximum pressure and then drops to zero in a very short time. So, unfortunately, there is no slow decrease of the cylinder filling pressure. The working pressure would only be important if it needed to be adjusted, though this is normally not necessary.



Art. no.:
EAN Code:
For Ø:
4/6 mm
Volume packaging:
1.93 l
Gross weight:
581 g
Net weight:
465 g
Weight factor:
Packaging dimensions (l/h/w):
105/152/121 mm


Animal species: Tetras, Barbels, Danionins, Livebearers, Cichlids - Small “Predators”, Cichlids - Algae Eaters, Cichlids - Large “Predators”, Labyrinth Fish, Goldfish, Veiltails, Catfish, Loaches, Blowfish, Spiny eels & Reedfish, Butterflyfish & Panchaxes, Killifish & Rainbowfish, Juvenile Fish, Silver arowana, Axolotl, Shrimps and dwarf crayfish, Discus fish, Crustaceans, Guppy, fighting fish, Flowerhorn cichlids, shrimps, cichlids: angelfish, discus, snails, molluscs, sterlets
Animal size: For all animal sizes
Animal age group: All aquarium fish
Volume habitat: For all aquariums
Material: metal (aluminium)
Colour: black

Electronic label / illuminant

Mercury: No
Dimmable: No

Technical Data

Height:90 mm
Length:80 mm
Width:140 mm
Wie wird der Arbeitsdruck bei den Druckminderern JBL PROFLORA CO2 REGULATOR ADVANCED und PROFESSIONAL eingestellt?

Bei der Verwendung mit Einwegflaschen, ist der Einstellknopf für den Arbeitsdruck zeitgleich auch das Ventil zum Öffnen Ihrer CO2 Flasche. Bei der Verwendung von Mehrwegflaschen haben Sie eine zusätzliches Flaschenventil, öffnen Sie dieses zuerst. Der Flaschendruck zeigt Ihnen nun einen Druck von ca. 60 bar an. Somit ist die Flasche ausreichend gefüllt und Sie können mit den nächsten Schritten fortfahren.
Drehen Sie nun an dem Einstellknopf für den Arbeitsdruck, der große Schraubknopf zwischen beiden Manometern, und beobachten den rechten Manometer für den Arbeitsdruck. Der grüne Bereich bis 1,2 bar ist gekennzeichnet. Öffnen sie so weit, dass der gewünschte Arbeitsdruck erreicht wird. Die Einstellung der Schraube erlaubt die Öffnung bis auf ca. 1,2 bar.
Bei der Verwendung eines Magnetventils stellen Sie nun die Stromzufuhr her, sodass das CO2 passieren kann.
Als letzten Schritt öffnen Sie das Nadelventil zur Einstellung der CO2-Menge (Blasenzahl) und stellen in etwa eine Blasenzahl von 10 – 15 Blasen am Blasenzähler ein. Nach der Einlaufzeit von 24h stellen Sie die für Ihr Aquarium erforderliche Blasenzahl ein.

Der Druckminderer lässt sich nicht entfernen

Vermutlich steht Ihr System noch unter Druck. Schließen Sie das Flaschenventil und montieren den CO2-Schlauch von der Druckregelarmatur ab. Öffnen Sie die Regulierschraube und lassen den in der Druckregelarmatur noch vorhandenen Druck ab, bis beide Manometer 0 bar anzeigen. Lösen Sie die Anschlussmutter der Druckregelarmatur vom Flaschenventil.

Der Arbeitsdruck am Manometer ändert sich nicht

Wenn Sie den Arbeitsdruck einstellen, muss die CO2 Zugabe aktiv laufen. Andernfalls wird die Änderung nicht unmittelbar sichtbar bei einer Reduzierung. Eine Erhöhung wird auch ohne laufendes CO2 sichtbar, jedoch nicht unmittelbar. Deshalb sollten Sie, bei jeder Reduzierung oder Erhöhung, die Zugabe des CO2 Während des Einstellvorgangs sicherstellen.

Sind 1,2 bar Arbeitsdruck für mein CO2 System ausreichend?

Lange Zeit hatten JBL CO2 Druckminderer einen voreingestellten Arbeitsdruck von 1,5 bar. Dies hat sich in den Köpfen etabliert. Bei den neuen JBL PROFLORA CO2 Druckminderern mit Manometern ist der Arbeitsdruck bei Auslieferung auf 0 bar eingestellt. Sie öffnen die Zugabe über den großen Einstellknopf für den Arbeitsdruck und drehen so weit, dass der gewünschte Arbeitsdruck erreicht ist. Ca. 1,2 bar sind hier maximal einzustellen. Notwendig für den Betrieb aller JBL Rückschlagventile bzw. Rücklaufsicherungen sind mindestens 0,6 bar. Somit ist sichergestellt, dass das Rückschlagventil sich öffnet. Ein höherer Arbeitsdruck ist nicht notwendig, weshalb alle Zubehörteile auch mit den JBL PROFLORA BIO SETs funktionieren. Viele am Markt erhältlichen CO2 Zubehörteile nennen sehr unterschiedliche Angaben für den Arbeitsdruck. Aus Sicherheit wird der am Markt übliche Standard von 1,5 bar genannt. Notwendig ist in der Regel der Arbeitsdruck, der auch den JBL PROFLORA CO2 Zubehörteilen zu Grunde liegt. Nur wenige Ausnahmen benötigen einen Arbeitsdruck von über 2 bar und sind sehr spezielle technische Bauteile.

Pressure reducer for disposable and reusable cylinders at the same time?

Yes, this is possible without any problems with the JBL PROFLORA CO2 REGULATOR. If you have the SET U, you can connect reusable cylinders with the JBL PROFLORA CO2 ADAPT U - M adapter. This adapter is already installed in the SET M and can be removed with an Allen key. This makes it possible to install JBL CO2 disposable cylinders in the sizes 500g and 1200g. An ideal option for bridging the gap between bottle filling or during the holiday phase for your substitute carer.

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Additional product information and downloads

safety instructions

  • safety instruction for technical devices
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spare parts
Customer reviews


Overall rating: 5.0
1 public review for this product.

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db_aqva - Italian

Prodotto eccezionale, consente l’erogazione della co2 in maniera semplice e precisa. La qualità dei materiali è premium, solido e molto bello da vedere.

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