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GLA Infinite Nature Reactor SS/4.5L - Stainless Steel Aquarium CO2 Reactor

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GLA Infinite Nature Reactor SS/4.5L - Stainless Steel Aquarium CO2 Reactor (16/22mm)
GLA Infinite Nature Reactor SS/4.5L - Stainless Steel Aquarium CO2 Reactor (16/22mm)
GLA Infinite Nature Reactor SS/4.5L - Stainless Steel Aquarium CO2 Reactor (16/22mm)
GLA Infinite Nature Reactor SS/4.5L - Stainless Steel Aquarium CO2 Reactor (16/22mm)
GLA Infinite Nature Reactor SS/4.5L - Stainless Steel Aquarium CO2 Reactor (16/22mm)
GLA Infinite Nature Reactor SS/4.5L - Stainless Steel Aquarium CO2 Reactor (16/22mm)
GLA Infinite Nature Reactor SS/4.5L - Stainless Steel Aquarium CO2 Reactor
GLA Infinite Nature Reactor SS/4.5L - Stainless Steel Aquarium CO2 Reactor (16/22mm)
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GLA Infinite Nature Reactor SS/4.5L - Stainless Steel Aquarium CO2 Reactor (16/22mm)
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GLA Infinite Nature Reactor SS/4.5L - Stainless Steel Aquarium CO2 Reactor (16/22mm)

  • Experience GLA's Infinite Nature aquarium CO2 Reactor, solid stainless steel, heavy duty, professional CO2 reactor for freshwater planted aquariums. Handcrafted stainless steel perfection for everyday life, exquisitely built to last and never look back.
  • External CO2 reactor for high efficiency CO2 dissolution by internal whirlpool waterflow, allowing 100% CO2 dissolution in nature aquarium water
  • Mount the reactor external to your aquarium tank in the cabinet, installed inline within the outflow hose/tubing of your canister filter
  • Modern, innovative design allows for customization to suit your aquarium installation. *accommodates optional installation for external aquarium heater and/or UV filter, to keep your aquarium cabinet tidy. (accessories not included)
  • Hand assembled in the USA


  • Series: GLA Infinite Nature Reactor SS/4.5L
  • Material: Stainless Steel
  • Stainless steel reactor canister with seated O-ring and welded buckles
  • Capacity/Volume: 4.5 liters
  • External Height: 14.5 inches
  • Diameter: 6 inches
  • Fits filter hose size 16/22mm ID/OD (inside diameter /outside diameter) *to convert installation to accommodate 12/16mm size, then it's recommended to purchase two of the quick release filter coupling (12/16 to 16/22mm adapter)

Customer Reviews

36 reviews

  • 5

    Very high quality co2 reactor and looks great.

    Posted by Anatoli K. on 25th Mar 2024

    I really love this system. I use the ports for my autodoser with the GLA supplied caps. Works like a charm and no more misty bubbles in the tank.

  • 5

    Bad to the bone!

    Posted by Allen Law on 26th Jan 2024

    This co2 reactor is killer. Its super high quality and you can DIY the ports however to you like. Bonus is my tank no longer looks like soda water.

  • 5

    Very happy with this advanced co2 reactor.

    Posted by Malik Osa on 30th Dec 2023

    I was very surpised how well it was made. Very high quality piece and to my knowledge very flexible. I say this because I only use it to hold my heater and inject GLA's new liquid fertilizer they are letting me trial. Im injecting it via autodoser into one of the ports. I absolutely love this co2 reactor. My co2 is stable and warm all while being fed fertilizer under the tank without a sump. This is THE co2 reactor my friends.

  • 5

    Really effective co2 reactor..

    Posted by Ernesto Garcia on 26th Dec 2023

    I ordered this mainly to remove the soda fizz look from my inline diffuser. It works amazingly well at that. For my heater I’m using a junk Amazon 100watt heater that should have died winters ago but it’s still going. I just started using a generic UV stick light and seemingly all is working as it should. I do wish it came with a sorta landing pad, like a die cut piece of foam. Other than that no complaints at all. I can see this thing lasting longer than most everything I own. Maybe overbuilt, but it sure looks nice under the hood.

  • 5

    Freaking awesome!

    Posted by David Ramsey on 25th Dec 2023

    Much nicer than expected. I use my titanium heater but I turned the second port into an auto dosing port. This thing is incredible. My tank stays heated this winter and my fertilizers get fed directly into the mix with my co2. Amazing design and incredibly useful. My plants are thriving and zero bubbles.

  • 3

    Not w/o its frustrations but well made

    Posted by MattyP on 15th Nov 2023

    I will agree with others that the reactor is well made and looks great in a high end setup. 5 stars quality, 4 stars operation, and 2 stars set up to be clear here. Because it is not without its frustrations in setup. My struggles came from fitting my tubes (e.g. ADA uses 15/20 and this is 16/22), getting the C02 flow correct so gas doesn’t pool, and finding heater and UV light components that actually FIT – I had to try multiple brands. Finally, if you expect it to simplify your setup, be forewarned you may need to add a lot of adapters and fitments depending on your filter outputs and lily pipes, as it only comes in 1 size both input and output. I can certainly write more on each of these if this gets excepted and I can edit it later – I love GLA products overall but this takes a special level of patience.

  • 5

    Its excellent.

    Posted by Roman Ospiaza on 23rd Oct 2023

    This is a heavy duty last forever reactor, and she's a fatty. This is my new favorite bit of co2 kit from GLA. Im working on DIY fertilizer injection system into one of the ports. One All In One solution to dose when needed. This reactor is very high quality.

  • 5


    Posted by Derick McAlester on 17th Oct 2023

    GLA co2 reactor is awesome, and works incredibly well. All co2 is 100% saturated, and makes my cabinet engine room look so sophisticated. I only use the heater function for now, but maybe in the future I will use UV to avoid fish disease.

  • 5

    This is the best co2 reactor on earth.

    Posted by Craig Lemu on 8th Oct 2023

    I tried so many reactor systems and this is the one. Its the perfect size for my Oase filter. It is not only beautiful but its multifunctionality just makes my tank look so much better. No more 7-up look in my aquascapes. Water is so clear now!

  • 5

    The best co2 reactor.

    Posted by Nestor Gonzales on 8th Jul 2023

    I love this reactor thus far. I only use a UV stick inside because I dont need heat. Although I feel UV also heats the water I could be wrong. Its a very beautiful piece. I had it installed in minutes and no more co2 bubbles inside my tank.:)

  • 5

    Very high quality product.

    Posted by Ernesto Rodriguez on 5th Jun 2023

    This is a very high quality product, However I had trouble using it because my filter pump just cant provide enough power for its volume. I had issues because the reactor is very large and my filter was almost the same size. It caused heating issues because I was not using it correctly. I asked GLA for help and they advised I increase pressure in the reactor with a more powerful pump. I had an extra pump I plumbed inline after my filter and before my reactor. The next day with the new pump when co2 had been on all day had fixed the issue 100%. I now know what makes a good co2 reactor work(pressure). If you have some tiny low flow pump do not use this, its to large. When dealing with added volume you have to understand what you are dealing with. GLA was very supportive and the guidance proved perfect.

  • 5

    The aquarium co2 reactor.

    Posted by Jermaine Brooks on 6th May 2023

    I love this reactor, its everything and then some. I use my old titanium heater and I have DIY'd and inlet on the other cap to feed my fertilizer from my autodoser. My new GLA Infinite filter is performing wonders for my tank. This reactor is the best in the hobby, go figure its GLA!

  • 5

    GLA is the best in aquarium co2 delivery.

    Posted by Armand Fuentes on 29th Apr 2023

    This is one spectacular piece of co2 equipment. I’ve been a fan of GLA since 2008 when I started. I’ve enjoyed watching them evolve and pioneer the best co2 equipment in the hobby. If you’re looking for the best in aquarium co2 equipment, GLA is it. This reactor does everything a reactor is supposed to do. It houses my glass heater and a cheap UV stick from my local lfs. My tank is now crystal clear and no more 7-Up fizz all over it’s so much cleaner and clearer. I do notice I use more co2, but I expect that with total saturation.

  • 5

    GLA has the best co2 reactor.

    Posted by Frank Mulvaney on 15th Apr 2023

    This thing is the best in all aspects. GLA has always impressed with new aquascaping designs.

  • 5

    Very high quality and superb design.

    Posted by Ashand Ogdan on 13th Jan 2023

    I wait now 6 months to make this review. This reactor system has been an incredible addition to my aquarium system. I suggest if you have never used a co2 reactor, or dont understand what makes a co2 reactor work, you contact GLA. They know how, and what makes co2 reactor work efficiently. All while housing your heater and UV stick. My advise, get a powerful pump that you can control so you can adjust flow to perfection, makes all the difference in the world. GLA may offer this in the future I hear. You want the big pump and ball valve to create lots of pressure inside, to put pressure on the co2 bubble and make the pocket inside small. It will quickly dissolve the co2 faster this way. Even so, it will work at a normal rate of flow just fine, I tried it all with my VRS pump. I also implemented a foam pad under mine for insulation and had my wife knit me a custom sock for winter . I wish you could see my Christmas sock lmao! I love this reactor from GLA!

  • 5

    Infinite reactor review

    Posted by Noel on 3rd Nov 2022

    Well made product. Easy to set up. I like the fact that you can run a heater and uv sterilizer with the provided ports or you can leave them capped off. Plants in my tank are responding better with the co2 dissolved into the water Vs when I ran a inline diffuser. Also makes the inside of your cabinet or co2,filter set up look nice.

  • 5

    GLA co2 reactor is the best in co2.

    Posted by Alejandro Montoya on 17th Oct 2022

    Make no mistake as I state this fact to all today on this day. GLA co2 equipment is the very best. Super customer service with no bullshit taken from me. These guys are stand up crew bring us the best in co2 system in America. I purchased my Pro-1 DS system from GLA and can vouch for GLA 100% as top quality. Everything is beautiful, and functionality is at a premium. GLA is helping me achieve excellence in my aquascaping abilities. My tank is happy and Im super happy:)

  • 5

    Its bad ass!

    Posted by Josh Riviera on 4th Sep 2022

    This is without doubt the best co2 reactor. This is the smaller of the two and I could not imagine powering the bigger one. This dissolves all your co2 and houses your heater. I dont use a UV but I will be doing what others are doing and implementing an auto-dosing port. Im going to make a nice sock for it come winter and that will double the efficiency of the heater element.

  • 5

    Undoubtedly the best co2 reactor made.

    Posted by Thomas Ripley on 3rd Sep 2022

    Ive waited 6 months to write this review for this particular reactor. First things, construction, its immaculate, very well purpose built device. Co2 100% saturates nothing escapes. I have yet to use any of the heater options but I did test it for a few weeks and it was awesome. Your going to need a good amount of flow for these reactors. These are not small, so make sure your pump provides good pressure. If your using a canister filter with weak flow, install an inline pump between your filter and reactor. Thats what I did and I love and I think my filter loves it the same.

  • 5

    This is THE co2 reactor.

    Posted by Phillip Brody on 25th Aug 2022

    If your looking for a super co2 reactor this is it. Im blown away at this thing. I have 1 heater and a DIY auto-dosing port I made myself out of PVC. It was stupid easy! Now I have my DIY all in one fertilizer injected into the reactor. Its feeding my plants co2,providing heat for my tank and feeding my plants nutrients. All below my aquascape, I love this!

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