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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 Regulator

(34 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 Regulator

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
  • Includes: one nylon seal
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.

34 Reviews Hide Reviews Show Reviews

  • 5
    Excellence in a compact co2 regulator.

    Posted by Brian Washington on 25th Jul 2021

    I love this thing. The best part is it fits all cylinder types. You will need to order tubing, keep this in mind. I had it up in running in 5 minutes, its perfect.

  • 5
    Amazing Co2 Regulator

    Posted by Chandu on 31st May 2021

    I have tried all the brands and GLA is the best quality product

  • 5
    Solid Regulator

    Posted by Michael on 13th May 2021

    I had originally purchased a regulator on Amazon for my setup. While that one did work, it felt flimsy and I had to tighten the solenoid every time I switched out tanks. I just wanted something I had more confidence in in the long right. Confidence in your equipment is a big deal when you have so much money invested in a tank that relies on it. So I went with this one and could not be happier. It feel more durable and was easier to get the bubble count correct compared to my previous regulator. While I have only had this one in use for a couple weeks now, I have had no issues.

  • 5
    I love it

    Posted by Alan Wilfred on 9th May 2021

    I run this regulator on a 90g tank and so far its been great. I like that it will work on every type of cylinder on the market. Should my tank plans change this regulator is super flexible. Although its not modular like the DS model it still uses the same guts. Thank you GLA.

  • 5
    I love this regulator.

    Posted by Jesse Daniels on 20th Mar 2021

    What a terrific regulator, exactly what my tank needed. It came with everything in the box you would need to install and get moving. Came with all the tools to install and even service it in the future. Installing it was super easy, only a fe w minutes as the instructions are super easy to follow. I also found this helpful, You will be extremely happy with your Gro regulator, top notch.

  • 5
    Super build and quality

    Posted by Jacob S. on 5th Mar 2021

    I got this for my calcium reactor and its all I could ask for. Compact,heavy duty and uses legit water tight chord grip.

  • 5
    Quality matters

    Posted by Tyler on 8th Oct 2020

    No more headaches from nasty finicky needle valves. Moving to a high end needle valve is an amazing feeling. It just works.

  • 5
    So far am very pleased

    Posted by Kat on 22nd Jul 2020

    I received my regulator 2 weeks ago and must say I am very pleased so far. My old regulator had a crap needle valve and would dump CO2 into my tank sometimes. After installing this regulator and also getting a new co2 diffuser (I got a metal one since I broke the glass one when taking it out for a cleaning), my plants are looking quite happy and there is a steady stream of bubbles into the tank daily that I haven't really had to adjust. I will say an improvement to the design could be painting arrows on the dials to indicate which direction to turn the valves in- not gonna lie that confused me very much upon installation. Also, there was one day where I set the pressure for 40 ppm? and the next morning it was at 20 ppm. However, that could have been other factors and not the regulator's fault. Anyway, overall so far I am very glad I spent the money on this regulator! Also, GLA's customer service was helpful. __________________________ Reply: It was a pleasure helping you with your co2 system. When setting up its critical to always adjust your PSI with the solenoid activated in the off position. This will keep any upstream pressure from effecting physical adjustment of the psi gauge. Its a basic mistake we see made often. However no harm no foul because it can not damage anything. It only takes basic procedure know how and the rest is breezy. Thank you for your trust and support! Best, Laura @ GLA-Team

  • 5
    Great quality,simple to set up

    Posted by Jordan on 4th May 2020

    Cant think of anything i could possibly critique, the regular was delivered quickly, went together quickly and easily, and is keeping my co2 levels perfect for my plants

  • 5
    Beautifully made, sturdy, and functions immaculately

    Posted by Vic on 3rd May 2020

    One of the more well made pieces in my setup. Too bad it has to hide in the cabinet. This regulator feels sturdy, and the dials are well made and so smooth. Highly recommended.

  • 5
    Excellent co2 regulator

    Posted by Ken Brill on 3rd Feb 2020

    I bought this regulator along side a GLA DS series co2 regulator. I use this one on a 10g tank that has a small cabinet space so I needed something compact. I was not totally sure what to expect when it arrived but I can say this co2 regulator has a really nice build quality. The needle valve was super easy to adjust, install was almost thoughtless. I had it installed in under 5 minutes. This co2 regulator was above and beyond my expectations. GLA service was second to none to boot.

  • 5

    Posted by Judy Alvarez on 28th Jan 2020

    I dont know much about aquarium co2 systems, this was my first. Its been a couple months since I had it and its been absolutely great. The only thing I do is refill the bubble counter and wipe clean regularly with plant based metal cleaner. Its just so pretty I cant help but to keep it looking so good. Its the nicest piece of aquarium equipment I own and it was only $150. Very happy with all my purchases from GLA.

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