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Green Leaf Aquariums is a leading planted aquarium brand with 20 years industry expertise in: professional lifetime aquarium CO2 systems, the finest quality aquarium plant fertilizers, thriving aquarium plants & tissue cultures, and specializing in custom hardscape design

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  • Green Leaf Aquariums
  • Green Leaf Aquariums, LLC
    5200 NW 43RD STREET
    SUITE 102-264
    text/SMS:(833) 679-0910
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GLA GRO Aquarium CO2 System

(18 reviews) Write a Review
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Pressure Reduction



CO2 Distribution



Our Standards

Handcrafted Excellence
✓ exceptional care and pride in what we build
✓ bringing our passion to life

Elite Performance
✓ for your next aquascape
✓ and for every aquascape after that

Built to Last
✓ your everyday super CO2 regulator
✓ a regulator that is truly unmistakable

Our Guarantees

Installation Support
✓ dedicated expert installation support
✓ we are here to help you get started

Lifetime Warranty
✓ rock solid lifetime warranty
✓ your peace of mind guaranteed

Lifetime Support
✓ we back what we build
✓ we will be here to help you into the future


GLA GRO Planted Aquarium CO2 System

GLA's complete GRO CO2 system provides planted aquarium hobbyists with the essential CO2 equipment they need to grow a thriving aquascape. Our extremely reliable CO2 equipment allows you to focus on what's important, growing and enjoying your planted tank. Our GLA GRO CO2 System includes the following equipment:

  • GLA GRO Aquarium CO2 Regulator
  • 5lb CO2 tank, aluminum CO2 cylinder (ships empty). Configure your system with one or two 5lb cylinder tanks above.
  • Premium plastic check valve
  • Nylon seal
  • Clear CO2 resistant aquarium tubing (10 feet)

Our GLA GRO CO2 Regulator is a compact and sleek, high performance everyday CO2 regulator for single aquarium installation. The GLA GRO CO2 regulator is built with premium components, perfectly tailored to your planted aquarium, for superior CO2 distribution. We design our CO2 regulators in the USA, handcrafted with premium pneumatic components to provide a distinctly reliable and innovative solution for CO2 distribution. Our CO2 engineers build and test each regulator to order and provide lifelong customer support for each and every regulator we build. Our innovative, forward thinking CO2 technology is highly rated in the planted aquarium community. We have pushed the limits of aquarium CO2 technology, setting a new industry standard for CO2 distribution. We are dedicated to providing professional CO2 regulators and aquarium CO2 systems to the planted aquarium hobbyist and to specialized industries seeking the best CO2 equipment available.

  • Premium aluminum regulator body
  • Micro precision needle valve rotates 360 degrees
  • Innovative, optimal performance 'cool touch' solenoid valve
  • Premium GLA bubble counter with check valve to protect your equipment
  • Multistage micron filtration inlet and outlet
  • Laser precision metal-on-metal valve seat
  • Integrated pressure relief valve (PRV)
  • Premium quality pneumatic components
  • Custom designed, pressure tested, and leak tested in the USA
  • Primed for your next aquascape
  • Handcrafted by our expert CO2 engineers for everyday life, so you can enjoy your planted aquarium without worry.
  • We are dedicated to providing unparalleled CO2 technology and setting the industry standard of CO2 distribution excellence.
  • We are confident that our GLA CO2 regulators rise above and outlast the competition.
  • Installation: CGA320
  • Output Pressure: 0 - 70 PSI
Limited Lifetime Warranty: GLA GRO CO2 Regulators are covered under a limited lifetime non-transferrable warranty against defects in materials and workmanship, when used in strict compliance with Green Leaf Aquariums, LLC (GLA) recommended usages, while the goods are under the ownership and control of the original purchaser. The lifetime warranty does not guarantee that the product will perform for the lifetime of the buyer. The actual time that the product can be expected to perform is determined by the highest standard of working time for products of its kind and per the buyers usage and application. If the product is discontinued, the warranty will remain a limited period longer, and then claims will be warranted with a similar product or credit, as determined by GLA, and appropriate to the product's age and condition at time of claim. GLA does not assume any responsibility or make any warranties with respect to items which are modified, altered, abused, misused, damaged, or serviced by unauthorized personnel. The warranty is void if at any time a wrench is used on the regulator, for any purpose, other than to tighten the regulator to the CO2 cylinder. It is important to read instruction guide provided when installing product, for damage due to improper installation is not covered under the warranty, although GLA will happily provide support and service for the product at a determined repair cost.

18 Reviews Hide Reviews Show Reviews

  • 5
    Heavy duty co2 system.

    Posted by Michael Waters on 16th Jul 2021

    For a co2 regulator being so compact it sure weighs a lot. Its a dense hunk of metal that goes on buttery smooth. It took me all of 5 minutes to get up and pumping. Adjusting co2 was super easy, Im amazed I was able to do this by myself. Thanks to the instructions and videos they provide its a piece of cake. The GLA co2 tubing was much nicer than anticipated and meshed perfect with the inline co2 reactor. My tank is loving this system!

  • 5
    CO2 regulator

    Posted by Prajwal Chaudhari on 27th May 2021

    Works perfect and easy to install! Thanks

  • 5
    Stellar Co2 system.

    Posted by Dennis Mitchell on 10th May 2021

    This is only my second co2 system so Im not an expert. This kit was leaps and bounds from my co2art regulator, which was more of a lightweight paper weight that could barely even do that as a paper weight. This Gro system comes with an actual industrial grade co2 cylinder,tubing and inline check valve. The only thing you need to add is a co2 diffuser. I opted for GLA's 90mm Atomic diffuser and the pair are absolutely perfect. Its been about 9 months now and I could not be happier.

  • 5
    Best kit for a great price.

    Posted by Edgar Moody on 21st Mar 2021

    I really was not sure what to expect as this is my first co2 system. With no experience I was able to install this system in a matter of minutes. Everything was super easy to follow, they even have some youtube videos explaining things. Customer service was like no other experience Ive had online before. They answered questions at all hours even on a Sunday. What the heck more could you ask for? Thank you GLA for making this so easy.

  • 5
    Love this product

    Posted by Larry Grenier on 4th Mar 2021

    I like the simple yet well-built product. I also appreciated GLAs customer support since I needed a few questions answered as I was setting this up.

  • 5
    GLA Gro system

    Posted by Bernard on 28th Jan 2021

    Quality well built CO2 system.

  • 5
    Great system for beginners

    Posted by Danilo on 17th Jan 2021

    This is my first experience with injected CO2 and I gotta say you cannot go wrong with the GRO system if you’re new to CO2 in aquariums. I got mine along with an in-line aluminium diffuser from GLA in September but I didn’t set it up until December when I finally got my hands on a tank the size I needed (thanks pandemic for messing up with supply chains! Sigh!). At times I was dreading the day of finally setting up my aquarium because it mean to put together this CO2 system, thinking it’d be nightmare of a precision work cuz we’re talking about pressurized gas. Far from it! The instructions that came in the package are super clear and fool-proof and I got my GRO system set up and running in less than an hour! Besides tinkering with the appropriate rate of injected CO2 for your tank, the GLA GRO CO2 system, when connected to a timer, is practically “set it and forget it!” (until you have to refill your CO2 cylinder, that is).

  • 5
    So happy!

    Posted by Kevin McMurphy on 24th Apr 2020

    Fantastic regulator I could not be more thrilled with. Ive used many other brands of co2 regulators for my planted tank and reef tank, but GLA takes the cake when it comes to co2 systems.

  • 5
    Great kit and fantastic service

    Posted by David Washington on 12th Feb 2020

    This Gro system has exceeded my expectations by a mile. For a complete system with cylinder this kit is hard to beat. Its backed by GLA full customer support system which as a newbie I was totally grateful for. My 75g tank is a showpiece in my house and the topic of discussion every time we have guest. Its the GLA co2 system that really propels the discussion in my home when guest see it. It looks very sleek,clean and neat. Its perfect for the compact space I have under my 75g tank. I do love this regulator:)

  • 5
    Stellar system

    Posted by Oscar Hoyer on 29th Jan 2020

    This is one great aquarium co2 system. Everything from form to function of this system has been exactly what I wanted and is why I went with GLA. The only thing this system did not come with is a co2 diffuser, which I totally understand because there are a tone of sizes. GLA was there for me with helping me choose a co2 diffuser for the tank Im setting up. I opted for the co2 reactor they sell and it has been working flawless now for almost 2 months. You will notice the quality the minute you set this co2 system up. Super easy instructions and only a few minutes of install time. I spent the next few hours just marveling how nice it all was lol.

  • 5
    GLA Grow system

    Posted by Nicole Lowy on 5th Nov 2019

    So happy with it!

  • 5
    Repeat purchase

    Posted by Alec Killian on 7th Oct 2019

    I lost my first unit in a cross country move. I knew I would be dissapointed by a different replacement. The directions were easy to follow and all my connections were good the first time around also, the gas cylinder was cheaper than I could source it myself.

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