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Large Mixer Reactor CO2 Diffuser For Aquariums Up To 500L

18 Reviews

£19.99

Mixer Reactor CO2 Diffuser - Large for Aquariums up to 500L

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Key Facts

For 1,000 - 2,000 Litres / Hour flow rate.
Efficient CO2 diffusion.
Traps CO2 in the reactor housing until completely diffused into the aquarium water.
Dual impellers mix the CO2 with water.
Compact size enables use internally or externally of the aquarium.
Electricity is not required, since it uses the flow of water from the filter.
Easy to clean and maintain.
Will fit 12/16mm and 16/22mm (using spacers). Click here for tubing size advice
Height: 33cm
Diameter: 5.5cm

Description

A Mixer Reactor Diffuser uses the outlet from a filter or pump to mix CO2 directly with the water before entering the aquarium. The process works by mixing the CO2 and water at the top of the diffuser using dual impellers, which spin using the force of water entering the reactor.

The outlet is located at the bottom of the reactor chamber, and therefore only fully diffused CO2/water exits the device because the CO2 will remain at the top of the unit it is fully diffused. The result is that near 100% CO2 absorption can be achieved.

The reactor will fit 12/16mm tubing, but spacers are also included to enable fitting of 16/22mm tubing.

Instructions

Reactors are installed on the return / outflow tubing from a filter as the water is reintroduced to the aquarium.
Cut or replace your filter tubing with PVC tubing.
Attach filter tubing to corresponding inlet/outlet of the reactor.
Connect CO2 supply to CO2 inlet of the reactor.
Turn filter and CO2 on and allow reactor to fill with water.
Invert (turn upside down) the reactor to eject any trapped air.
Adjust CO2 rate until desired level of dosing is achieved.

Related Products

Regular Size ISTA Max Mix Mixer Reactor Diffuser for planted aquariums

Mixer Reactor CO2 Diffuser - Regular for Aquariums up to 150L

Photo of Turbo Reactor Diffuser for planted aquariums

External Turbo CO2 Reactor - for 12/16mm Hose

Customer Reviews

Average Rating

Individual Reviews

Tom M. Verified Buyer 14th Feb 2024

This is what i expected for £20, I am happy with the reactor and its a very good price but it is obvious why its cheap. I found air was being pushed through a gap where the central pipe on the inside connects to the top nozzle, this caused air to be pushed into the aquarium. I found adding an O ring to the nozzle on the inside completely prevents this, it worked for both reactors i bought. i read more... This is what i expected for £20, I am happy with the reactor and its a very good price but it is obvious why its cheap. I found air was being pushed through a gap where the central pipe on the inside connects to the top nozzle, this caused air to be pushed into the aquarium. I found adding an O ring to the nozzle on the inside completely prevents this, it worked for both reactors i bought. i did have to shave a very small amount of plastic off the top spinning "propeller" to prevent it getting squashed up against the O ring. I also had to shave off the mould seams on the top nozzle of the reactor to get a decent seal with the 90 degree bend. Even now its leaking ever so slightly. The seal on the bottom is a bit of a pain to get right, sometimes it seals perfectly sometimes not. I tested by covering 1 nozzle and the CO2 hole and blowing then listening for air. There really isnt much of a tail on the 90 bend for the hose to comfortably connect to. Overall im happy enough

S Y. Verified Buyer 13th Jan 2024

This unit spins well and provides excellent diffusion. I don't like to see bubbles in the tank and as it doesn't produce many bubbles it does just what I want.. This unit spins well and provides excellent diffusion. I don't like to see bubbles in the tank and as it doesn't produce many bubbles it does just what I want..

Colin S. Verified Buyer 17th Oct 2023

I hate seeing CO2 bubbles floating around the tank and this solves that by trapping the CO2 in the reactor, so I am very happy with my purchase. The impellers are pretty much silent, I can only hear it if it put my ear right up close to it. I hate seeing CO2 bubbles floating around the tank and this solves that by trapping the CO2 in the reactor, so I am very happy with my purchase. The impellers are pretty much silent, I can only hear it if it put my ear right up close to it.

Mike D. Verified Buyer 21st Apr 2023

Unfortunately this items construction is inadequate. Its extremely hard to fit into a tight space whilst being able to bleed any air out. Once I did get it working correctly it was not as efficient as my current inline diffuser. I am disappointed and removed it after a days operation. Unfortunately this items construction is inadequate. Its extremely hard to fit into a tight space whilst being able to bleed any air out. Once I did get it working correctly it was not as efficient as my current inline diffuser. I am disappointed and removed it after a days operation.

Reply from CO2 Supermarket
We're sorry to hear you've had problem. Yes, space is required to invert the reactor in order to expel trapped air after installation, or you can temporarily detach the CO2 tube and allow the air to escape from there. Reactors are 100% efficient as the CO2 is trapped in the reactor and cannot escape.

Gerry . Verified Buyer 10th Jan 2023

Excellent service, no problems, thank you. Excellent service, no problems, thank you.

Simon S. Verified Buyer 18th Nov 2022

Works great, no more bubbles in the tank with this Works great, no more bubbles in the tank with this

Adrian K. Verified Buyer 8th Oct 2022

well worth the money well worth the money

Byron B. Verified Buyer 27th Jul 2022

Biggest waste of money ever. Leaked everywhere. Propellers did not spin even running with Fluval 407. Had to then spend money to replace tubing that I had cut to fit. Absolutely fumming Biggest waste of money ever. Leaked everywhere. Propellers did not spin even running with Fluval 407. Had to then spend money to replace tubing that I had cut to fit. Absolutely fumming

Reply from CO2 Supermarket
We are sorry to hear that, Byron. Sometimes there is a small burr of plastic that might be stopping the impellers from spinning freely, so once you file that off you should find they spin smoothly.

Mohamed S. Verified Buyer 25th Jan 2020

If you're using 12mm/16mm I think it will be fine, but for the 16mm/22mm don’t buy as it will leak through the connection If you're using 12mm/16mm I think it will be fine, but for the 16mm/22mm don’t buy as it will leak through the connection

Ivor G. Verified Buyer 26th Nov 2016

Excellent way to inject CO2 into the aquarium water Excellent way to inject CO2 into the aquarium water

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