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Aluminum Inline CO2 Diffuser

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Aluminum Inline CO2 Diffuser
Aluminum Inline CO2 Diffuser
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Aluminum Inline CO2 Diffuser
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Our aluminum CO2 diffuser is designed to be installed outside of the aquarium, inline within the outflow tubing of your canister filter, either below the aquarium or mounted to the aquarium glass. This diffuser is capable of 100% dissolution of CO2 in the aquarium water, creating a fine mist readily absorbed by plants.

features aluminum body that easily comes apart for thorough cleaning

features a replaceable ceramic tube so that you can ensure lifetime use and performance

mount outside of aquarium inline within outflow tubing of canister filter

select to fit tubing size 12/16mm ID/OD or 16/22mm ID/OD (inside diameter /outside diameter)

Creates a super fine mist of CO2 bubbles, bubble size is less than 0.1mm diameter

Important Instructions...

This professional quality diffuser requires a minimum of 30 psi working pressure.

Must be used with Green Leaf Aquariums CO2 pressure rated tubing only, not for use with silicone or other brand tubing. Tubing must be acid resistant and rated for high working pressure. Compatible with all tubing sold by GLA.

Handle diffuser carefully, do not touch ceramic. Install and remove tubing carefully.

Do not use with bubble counter fluid or other bubble counter oils. Fill bubble counter with water only to avoid contamination of diffuser.

Monitor and clean diffuser regularly.

Shipping, Warranty & Returns

Diffusers are not warranted against improper use or handling. Please read all important notices listed above prior to purchase and prior to use.

Customer Reviews

26 reviews

  • 5


    Posted by Sam on 13th Nov 2023

    Easily applied this to my tank plumbing, once the pressure if right this thing makes tiny bubbles. I can really only see them when my nose is up against the glass, awesome product.

  • 5

    Very well made and packaged with a certificate.

    Posted by Richard H. on 9th Aug 2022

    I had retired my Atomic diffuser just to try something new so I ordered this. It arrived timely and with some cool decals from GLA. A tiny certificate was inside with date,signature and model. I emailed the same hour asking about the signed certificate and GLA said they assemble every aluminum diffuser on site. The certificate was to let you know its going to work right out of the box. Its provides a nice tiny fog like mist similar to the Atomic. What I like most is the ability to open it and get inside of it. yes it does have orings that in 5-10 years may wear out. But, so will I by then. Love GLA products and this inline diffuser.

  • 5

    Works great!

    Posted by Interpolean on 22nd Jul 2022

    Tiny bubbles, easy to use, working for 2 weeks with no problems.

  • 5

    Works Well

    Posted by Jordan on 13th Jan 2022

    I decided to try this one instead of the other model of diffuser because I like the look of it, honestly. Overall really solid product, and I like that the ceramic insert is replaceable so I have two on hand, one to work and the other hanging out after a clean and drying until the other one is dirty. My only complaint is there’s no direction posted on the check valve, so I had to play around a little bit.

  • 5

    High quality co2 diffuser for inline

    Posted by Eli Ducos on 20th Dec 2021

    Fantastic quality and great warranty with support

  • 5

    Aluminum Inline Diffuser

    Posted by Brent D on 17th Nov 2021

    Like all GLA products, this is a superior item. Easy installation and it provides complete diffusion of CO2. The changeable ceramic cartridge is the ‘icing on the cake’. I definitely recommend this diffuser.

  • 5

    co2 diffuser

    Posted by dave on 20th Aug 2021

    you can't tell co2 is being dispersed. build quality is professional grade

  • 5

    Amazing diffuser

    Posted by Ryan on 19th Aug 2021

    So happy with this purchase. The distribution of CO2 is noticably better with this inline diffuser as opposed to my original in tank diffuser. I can visibly see the effects with better looking plants and everything is pearling. Also I no longer have to deal with 'sprite water' with all the mist. The bubbles coming out of the outflow are barely noticeable. I wish I would have bought one of these earlier. No more cleaning the diffuser every two weeks and the craftsmanship is top notch. Worth every penny. When I set up my 90cm tank in the future I will definitely be buying another one of these.

  • 5


    Posted by ttony on 11th Jul 2021

    Using this on a 125 gallon aquarium works great

  • 5

    Works as intended

    Posted by Emma on 26th Jun 2021

    Seems to be high quality although it's not GLA brand? Anyways, it diffuses the CO2 very well and very good aesthetics because the diffuser is hidden. Very good for big tanks. Staf Reply: Thank you! Yes its our own diffuser with our own strict quality control measures. Each one gets hand assembled with an included certificate from GLA.

  • 5

    Effective and easy

    Posted by David Ben-Avraham on 16th Apr 2021

    I have owned a number of different inline diffusers over the years, being able to change out the ceramic cylinder with such ease w/o having to detach the entire diffuser has motivated me to do more frequent cleanings of the diffuser making for a more stable CO2 level.

  • 5

    The best co2 diffuser

    Posted by Phillip John on 20th Mar 2021

    I love this diffuser, I own 3 of them running on a 1000g aquascape. I was going to go with the reactor but after contacting GLA this is a superior method. Especially for larger tanks. You can easily run these in series in a large tank because the footprint they carry is small. We use 2 under our 1000g and the tank is spot on perfect with GLA co2 system and diffuser kit. We use the Pro-2 co2 regulator to match and the match is made in heaven.

  • 5

    Top quality diffuser!

    Posted by Danilo on 17th Jan 2021

    Not to be dramatic, but I think I found a diffuser that will last me a lifetime (if the ceramic replacements keep being made, that is). Build quality is incredible! This diffuser feels like anything but cheap. I'm injecting CO2 on a tank for the first time so I have not enough experience to compare in-tank diffusers with this one, but from what I’ve seen in the LFSs I frequent, this inline diffuser creates bubbles way smaller than an in-tank one, almost like a fine mist I must say. While doing my research the takeaway was “the finer the bubbles, the better CO2 gets dissolved in the water” and I think this diffuser gets the job done. Tissue culture plants in my new setup were began photosynthesizing on the very day I setup the tank and even started to pearl. How crazy is that! That tells me the diffuser is doing an excellent job at dissolving CO2 in the water column. So yes, I highly recommend this diffuser, even if you’re. CO2 newbie like me! Do note that, while it comes assembled, the diffuser needs to be tightened a bit more before use to prevent gas leaks. Connect it to your CO2 regulator, run it for a while and submerse your diffuser in water. If bubbles come out from anywhere in the diffuser but the filter hose inlets, then you have a leak an need to tighten the diffuser parts.

  • 5

    One of the best In-line Diffusers

    Posted by Channell McCollum on 26th Dec 2020

    This is good in-line diffuser that looks professional and performs as it should. Just remember not to touch the ceramic. Little bubbles appear in the diffuser which are cool, but the bubbles dissolve before going to the tank.

  • 5


    Posted by Rob Cook on 12th Sep 2020

    Another fine product by, GLA. This is a great aluminum version as compared to the commonly seen plastic diffuser. This one was built for longevity.

  • 5

    Incredible build quality

    Posted by Steve on 4th May 2020

    Just received this to replace the plastic model. For the few dollars more than the plastic ones, go with the aluminium one. You will never regret it. Amazing build quality that is difficult to find these days.

  • 5

    Great Quality

    Posted by Garrett Kimble on 30th Apr 2020

    I am very happy with this diffuser. Appears to be very high qaulity and very easy to install. I love not having a diffuser in my tank.

  • 5


    Posted by Blake Durham on 28th Jan 2020

    GLA has the best diffusers hands down. This alluminum diffuser replaced my plastic atomic co2 diffuser. This model is certainly a step up in my co2 game. It has the ability to remove the ceramic stone to be cleaned or replaced. You dont need to buy 2 diffusers, just buy the extra ceramic tube and your set. One thing I liked about buying this diffuser from GLA was that they inspect each diffuser by hand to make sure all parts are accounted for. I purchased a knock off version is what looked like the same thing and when it arrived it was missing parts and appeared to not be properly assembled. The GLA diffuser arrived fully functional and now I have ample co2 mist entering my plant beds. Plants pearl like crazy by noon!

  • 4

    Review long overdo

    Posted by Edwin on 5th Jan 2020

    I purchased this diffuser sometime during April of 2019 The diffuser I had received in the mail had been damaged due to package mishandling. I contacted GLA via e-mail with photos immediately after arrival and Orlando did right by me and sent a replacement for it and some credit for plants that melted during the trip. The diffuser looks and feels durable because it is. Everybody looking at my scape eventually notices it, and it's not an eyesore. It aesthetically compliments my set-up, and stirs up conversation. Once they notice my glass lily-pipes, the next thing they see is this diffuser as their eyes follow the tubing, and eventually the rest of my shiny CO2 set-up. This diffuser will help make unsuspecting people assume you are a seasoned professional aquascaper. Everybody always asks or says "what is that for?" "It looks complicated" "Did you get it from the lab?" "Is this why your tank is so clean?" They are so impressed when I tell them "Those are not fake plants, they are real plants" (especially the red plants). Explaining basic plant biology to family and friends is something I have learned to do so well. My set-up is literally my visual cue to explaining why every piece of equipment is needed. My experience with this diffuser has been great, never would of thought this piece of equipment would lead to helping make a great conversation starter this past year. I love explaining to people how my set-up works, as it's one of the few things I know about so well, It's truly gratifying. Yes, I can probably buy something cheaper off of amazon or ebay that functions as well, but I rather have the support, service, and quality GLA provides for good looking products thus gladly pay the diff. as a premium. If the ceramic diffuser breaks during cleaning, I can just replace it and not the entire diffuser! I don't want to deal with cheap eye sores. Wish I could post some pictures!

  • 5

    In-line diffuser

    Posted by Nicole Lowy on 5th Nov 2019

    So happy with it!

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