Silent solenoid valve for regulated CO2 addition

  • Supplement for CO2 fertiliser systems or CO2/pH control units: separate solenoid valve for dosing the CO2 supply in aquariums
  • Easy to use: integrate the solenoid valve into the CO2 supply hose of the fertiliser system or mount it directly on the JBL CO2 pressure reducer
  • CO2 addition when needed: setting of CO2 addition by activating a timer or via CO2/pH control unit (timer and control unit not included)
  • Safe and economical: 12 V safety transformer, low heat generation thanks to power input of 0.8 W, up to 50 % CO2 savings, no noise emission, electronic power supply
  • Package contents: 1 silent solenoid valve with hose securing and universal power supply unit
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Price: 110,73 €
Recommended retail price incl. VAT
You can find this item in your specialist and online shop
Dealer close to you
CO2 cylinder
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Product information

Why do you need a solenoid valve or a night shut-off?
Since plants only need CO2 for photosynthesis during the lighting phase, you can turn off the CO2 supply at night. To save you having to turn the CO2 bottle on and off, there are solenoid valves (JBL PROFLORA CO2 VALVE) which can be controlled by a timer. The timer then switches, say, the light and the CO2 supply on via the solenoid valve in the morning and off again in the evening.
Shrewd aquarium owners will immediately recognise that the solenoid valve quickly recoups its cost price by saving the CO2 by half. It is always installed between the pressure reducer and check valve or directly screwed to the pressure reducer. If you want to use a pH computer with an automatic CO2 control, you’ll also need a solenoid valve. This is then not switched via the time switch, but via the pH control unit (JBL PROFLORA CO2 CONTROL).

Safe and economical
Thanks to its low power input of 0.8 W the valve body is hardly warm to the touch and operates with a 12 V safety transformer. The silent solenoid saves up to 50% CO2, since the CO2 supply is switched off at night.



Art. no.:
EAN Code:
12 V
Volume packaging:
1.93 l
Gross weight:
456 g
Net weight:
318 g
Weight factor:
Packaging dimensions (l/h/w):
105/152/121 mm


Animal species: Arowana, 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: For all aquariums
Material: plastic (ABS), metal (stainless steel), metal (copper)
Colour: silver / black

Electronic label / illuminant

Mercury: No
Dimmable: No

Technical Data

Height:120 mm
Length:40 mm
Width:100 mm
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.

Do I need a night switch-off when I use the JBL Proflora pH Control Touch or the JBL PROFLORA CO2 CONTROL?

You need a separate soleniod valve (JBL ProFlora v002 or JBL PROFLORA CO2 VALVE) to control the CO2 supply. A further night switch-off for CO2 systems, controlled by a pH control unit is not needed, as the CO2 supply will not be turned on in the absence of CO2 consumption, or it will happen less frequently when CO2 degassing occurs at the water surface. That is why the control units do not need a timer

Blog (opinions & experiences)

JBL TV #49: Saving energy in the aquarium - reducing costs made easy

Yes, we can make energy savings in our aquarium, but not where most people think! In this video we show exactly where and how to save electricity costs.

Find out more

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

Find out more
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!

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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?

Marine water - technical items

What is the difference between a marine and a freshwater aquarium? What is especially needed for a marine aquarium?

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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safety instructions

  • safety instruction for technical devices
    • Filename:
spare parts
Customer reviews


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

0 Reviews

3 more reviews in other languages

3 Reviews in other languages

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

Wir selbst benutzen diese Schaltung um über Nacht um zusätzlich Sauerstoff ins Becken zu lassen. Es ist hervorragend geeignet um über Nacht das co2 abzuschalten oder zusätzlich ohne viel Aufwand Sauerstoff ins Becken zu bekommen. Wenn noch nicht genug Pflanzen vorhanden sind um nachts das Becken mit Sauerstoff zu versorgen.

db_aqva - Italian

Prodotto di qualità, questa è la premessa. Nulla a che vedere con prodotti di altra gamma (e prezzo inferiore). Estremamente silenziosa, non ti accorgi nemmeno quando entra in funzione, cosa che cercavo avendo l'acquario in camera da letto. Consumi bassissimi e soprattutto non scalda affatto, vale i soldi che costa.

P. Aßmann - German

Klar, dass als erstes Contra-Argument grundsätzlich sofort der Preis genannt wird. Nach längerem Überlegen habe ich mir das Magnetventil nun doch mal besorgt.

Im Vergleich zu den günstigen Produkten aus Fernost, die zum Teil wirklich sehr heiß werden und wahnsinnig laut schalten, wird dieses Ventil nicht warm und ist flüsterleise: Man bekommt es wirklich nicht mit, wenn es schaltet.

Somit ist das Magnetventil zumindest für mich trotz der einmalig höheren Anschaffungskosten preiswert (= es ist seinen Preis wert 😉).

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