JDAquatec Midi reactor + bypass with mounting bracket

JDAquatec Midi reactor + bypass with mounting bracket

  • Effortless CO2 enrichment via the filter circuit
  • Easy technology
  • With integrated bypass
  • Suitable for all flow rates
  • For aquariums up to 500 litres
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Description

The JDAquatec Midi Reactor with a fixed bypass enables highly efficient dissolution of CO2 directly within the filter circuit. Thanks to the integrated bypass with ball valve, the filter’s performance remains unaffected, even at high flow rates. The reactor is ideal for aquariums up to 500 litres and provides a CO2 dissolution capacity of up to 1,500 bubbles per minute. With its sturdy mounting bracket and functional design, the system can be securely and flexibly integrated into existing filter installations.

The reactor is discreetly installed outside the aquarium in the line between the filter and the return hose. It is first secured using the sturdy mounting clamp, while the additional bracket provides even greater stability and safety. As the system operates without a diffusion membrane, the water flowing through it is enriched directly with CO2 and distributed evenly throughout the entire aquarium via the filter circuit. This enormous dissolution efficiency is achieved by a specially generated water vortex inside the reactor. This vortex keeps the injected CO2 in the upper section of the reactor until it is completely dissolved in the water. Unlike many other systems, the reactor operates without trickle media or other internal components that could become clogged over time. As a result, the system operates extremely reliably and is completely maintenance-free.

To control the CO2-concentration in the aquarium, a drop checker is recommended. Furthermore, the upstream CO2-system should be protected from backflowing water with an appropriate check valve.

The CO2-reactor can also be used for saltwater aquariums. However, it is recommended to use it only in nitrogen and phosphate limited marine tanks and to perform a consistent pH-control.

Features

  • Efficient CO2 dissolution within the filter circuit
  • Fixed bypass with ball valve
  • Suitable for all flow rates
  • Creates a specialised water vortex for complete CO2 dissolution
  • Without trickle media – no risk of clogging
  • Completely maintenance-free
  • Sturdy mounting with clamp and extra bracket foreven more security
  • For aquariums up to 500 litres (Midi Reactor)
  • High CO2 dissolution capacity of up to 1.500 bubbles/minute
  • Also suitable for marine aquariums

Dimensions

JDAquatec Midi Reactor + Bypass – with Bracket – 12 mm
Height 20 cm
Width 16 cm
Depth 9 cm
Recommended for aquariums up to 500 litres
Hose connection 12 mm (inner diameter)
JDAquatec Midi Reactor + Bypass – with Bracket – 16 mm
Height 20 cm
Width 16 cm
Depth 9 cm
Recommended for aquariums up to 500 litres
Hose connection 16 mm (inner diameter)
JDAquatec Midi Reactor + Bypass – with Bracket – 20 mm
Height 20 cm
Width 16 cm
Depth 9 cm
Recommended for aquariums up to 500 litres
Hose connection 20 mm (inner diameter)

Scope of Delivery

  • Midi CO2 Reactor
  • Fixed bypass with ball valve
  • Mounting bracket: clamp and extra bracket

JDAquatec

JDAquatec is a German manufacturer of aquarium technology with a focus on CO2 systems for freshwater aquariums. The products are designed for efficient injection and controlled dosing of carbon dioxide within the aquarium system. Well-engineered constructions with integrated bypass functions support an even distribution in the water circulation. The technology is developed for straightforward installation and reliable long-term operation. JDAquatec addresses aquarists who aim to promote healthy plant growth and maintain stable water parameters in planted aquariums.

Manufacturer information

Manufacturer
Name JDAquatec Jörg Düren
Street Hans-Sachs-Str. 52
City 47445 Moers
State Nordrhein-Westfalen
Country Deutschland
E-mail joergdueren@aol.com
Website www.jdaquatec.de

General information

Item no.
EAN
Weight
Shipping weight

Questions and answers about JDAquatec - Midi reactor + bypass - with mounting bracket

You have questions about this product? Ask other customer or our support team about this product!

Hi. For oase 800t filter I should buy this version? JDAquatec Midi Reactor Bypass with Bracket 16 mm?
Tomas M.
Apr. 2026
Sven Breitenbach
May. 2026
Support
Antwort: For the Oaser BioMaster 850 with a 16/22 mm hose, the d16 ist the right fitting reactor.
Helpful!
Hello. A review says the reactor would make the water cloudy. Is there anything to that? Or what is going wrong? Is it advisable to buy the reactor one size larger? Thanks
Translated from German
Friedhelm B.
Jul. 2026
Sven Breitenbach
Aug. 2026
Support
Neither we nor the manufacturer are aware of this phenomenon, and no complaints about such a case have been received so far.
Translated from German
Helpful!

Customer reviews

This item has been rated 5 out of 5 stars
2 Reviews
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5 Stars(2)
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1 Star(0)
Thorsten D.
Einwandfrei
28th September
JDAquatec - Midi reactor + bypass - with mounting bracket - 16 mm
JDAquatec - Midi reactor + bypass - with mounting bracket - 16 mm

Der Einbau sowie die Inbetriebnahme war sehr einfach und ging schnell. Co2 wäscht sich top ein und nach ein paar Stunden färbe sich der Checker hellgrün. Un (read more)

Frank H.
An unreserved recommendation
25th February
JDAquatec - Midi reactor + bypass - with mounting bracket - 12 mm
JDAquatec - Midi reactor + bypass - with mounting bracket - 12 mm

The reactor from JD Aquatec, which has been in use on my 100 x 50 x 50 cm aquarium for three years, has proven to be very reliable. (read more)

Translated from German
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Eine uneingeschränkte Empfehlung

Der Reaktor von JD Aquatec, der seit drei Jahren bei mir an einem Aquarium der Größe 100 x 50 x 50 cm im Einsatz ist, hat sich als sehr zuverlässig erwiesen. Ich verwende ihn zusammen mit dem Kugelblasenzähler von JDAquatec.

In dieser Zeit habe ich den Reaktor zweimal mit Chlorbleiche gereinigt.

Das CO₂ wird vollständig gelöst, es sind absolut keine Blasen bzw. Bläschen zu sehen, auch nicht sporadisch.

Der Reaktor ist bei mir wie folgt in den Kreislauf eingebaut:

Das Wasser kommt gereinigt aus dem Filter, läuft zuerst in einen UV-C-Klärer, dann weiter zum Reaktor und schließlich zum Durchlauferhitzer, bevor es in das Aquarium zurückfließt.