Description
GLA GRO Planted Aquarium CO2 Regulator
The GLA GRO CO2 Regulator is a compact, precision-built single stage regulator designed for reliable CO2 delivery in single aquarium setups. Built with high-quality pneumatic components and assembled to strict standards, it provides consistent output and dependable performance for planted aquariums.
Positioned as a streamlined option within the GLA regulator lineup, the GRO is designed for aquarists seeking reliable, consistent CO2 performance in a compact and straightforward configuration.
Designed for consistency and reliable long-term operation, the GLA GRO delivers stable CO2 performance for planted aquariums of many sizes when configured appropriately.
Who This Is For
- Aquarists seeking a streamlined and reliable CO2 regulator
- Single aquarium planted tank setups
- Hobbyists prioritizing compact installation and simplicity
- Planted aquarium systems not requiring modular multi-aquarium expansion
Aquarists seeking additional modular expandability or enhanced pressure stability refinement as cylinder pressure changes may also consider dual-stage systems such as the GLA PRO-DS or DS-MINI.
Key Features
- Single Stage Design: Reliable CO2 delivery for single aquarium setups
- Precision Needle Valve: Micro-adjustment for accurate and stable CO2 dosing
- Integrated Solenoid: Automates CO2 on/off with a timer or controller
- Premium Bubble Counter: Includes integrated check valve to protect internal components
- Pressure Relief Valve (PRV): Built-in safety feature for system protection
- Compact Footprint: Clean installation with minimal space requirements
- Tested in the USA: Pressure tested and leak checked prior to shipment
Performance & Design
- Laser precision metal-on-metal valve seat for consistent regulation
- Multi-stage micron filtration at inlet and outlet
- 360° adjustable needle valve for flexible installation
- Durable aluminum regulator body with premium pneumatic components
- Engineered to meet GLA performance standards and tested to ensure consistent, dependable operation.
Specifications
- Installation: CGA-320 (USA standard CO2 cylinders)
- Pressure Reduction: Single Stage
- Output Pressure Range: 0–70 PSI
- CO2 Distribution: Single Aquarium
What’s Included
- GLA GRO CO2 Regulator with integrated solenoid and bubble counter with check valve
- GLA OEM CO2 tank seal
The GLA GRO CO2 Regulator is designed for aquarists who value reliability, simplicity, and clean installation. It delivers consistent CO2 control for planted aquariums without unnecessary complexity. Simple, reliable, and built to perform—everything you need for a clean and effective CO2 setup.
GLA CO2 Equipment
GLA CO2 regulators are engineered to meet our exacting standards for precision, reliability, and long-term performance. Each unit undergoes inspection and testing in the USA to ensure consistent, dependable operation in demanding aquarium environments.
Trusted by aquascapers worldwide, GLA CO2 equipment has set a benchmark for quality—delivering professional-grade performance for aquarists who demand precision, reliability, and long-term results.
FAQ
Is this a dual-stage regulator?
No. The GLA GRO is a single-stage regulator designed for simplicity and reliability in single aquarium setups.
Can this run multiple aquariums?
Yes, with the addition of a GLA GRO CO2 splitter. However, for independent control and maximum stability, a dual-stage regulator system is recommended.
Will this work with standard CO2 tanks?
Yes. This model uses a CGA-320 connection, which is standard for CO2 cylinders in the USA.
Is this suitable for beginners?
Yes. The GLA GRO is commonly chosen by both beginner and experienced planted aquarium hobbyists seeking a compact, reliable, and straightforward CO2 regulator system.
Optional Add-On: CO2 Splitter (Multi-Tank Expansion)
Expand your GLA GRO CO2 System to run multiple aquariums with the GLA CO2 Splitter. Designed specifically for compatibility with GLA GRO regulators, this add-on allows you to distribute CO2 to additional tanks from a single regulator.
Each outlet includes its own precision needle valve, allowing independent control of CO2 flow to each aquarium for optimal tuning and plant growth.
- Expands CO2 distribution to multiple aquariums
- Independent needle valves for precise control per tank
- Easy installation directly onto GLA GRO regulators
- Designed for seamless compatibility with GLA GRO systems
Support & Warranty
- Lifetime Warranty: Regulator covered against manufacturing defects
- Lifetime Support: Expert assistance available
- Installation Guidance: We’re here to help you get started
Limited Lifetime Warranty: GLA CO2 regulators are covered by a limited lifetime warranty against defects in materials and workmanship for the original purchaser. This warranty is non-transferable and applies only when the product is used in accordance with Green Leaf Aquariums, LLC (GLA) guidelines and standard operating practices.
Warranty coverage applies only to products purchased directly from greenleafaquariums.com or authorized sales channels. Proof of purchase may be required for all warranty claims.
This warranty does not guarantee product performance for the lifetime of the purchaser. Product lifespan may vary based on usage, installation, and operating conditions.
- Coverage applies only to manufacturing defects under normal use
- GLA reserves the right to repair, replace, or issue store credit at its sole discretion
- If a product is discontinued, a comparable replacement or credit may be provided based on product condition and age
Warranty Exclusions:
- Improper installation, misuse, neglect, or damage
- Modifications, alterations, or unauthorized repairs
- Use of improper tools or excessive force
- Normal wear and cosmetic damage that does not affect functionality
Important: A wrench should only be used to secure the regulator to the CO2 cylinder. Damage resulting from improper use of tools or incorrect installation methods is not covered under this warranty.
GLA is not responsible for damage caused by improper installation or use. However, repair services and support may be available for a fee.
CO2 cylinders, tubing, cartridges, and other consumable or accessory items are not covered under the regulator warranty unless otherwise specified.
Customer Reviews
-
Heavy duty way better than my UNS regulator.
This regulator is so much better than the UNS regulator I have. First thing I noticed is the shear heaviness of the regulator. The most important part in my opinion is the connecting nut. Geez, you’d think UNS would use a substantial nut, nut Noooo! They use stupid aluminum for a high pressure connecting nut. That thing not only was destroyed on the outside but after a couple refills the threads inside started inverting. Yes, they started to bend into themselves because they are just soft. GLA Gro uses a nickel plated heavy duty nut that’s just solid as ever. Feels really good, but let’s move further. This needle valve is much nicer, better control that’s not all erratic with mild adjustments, it’s very precise. GLA is a level of their own and explains their notoriety. Go with GLA and not the replicas who try to follow what they do.
-
Love it!
Super happy, shipped very quickly and the customer service was fantastic. My tank is growing extremely well and look forward to buying more plants for it. Thank you GLA and John who helped us!
-
GLA makes the best co2 regulators.
This is my 2nd Gro regulator. My first was purchased in 2007, iI still use it in my living room aquascape. I got this one for my basement tank. These things are built like tanks. What I truly love about them is the needle valves easy tune ability. I don’t know what the correct verbiage is for this but in essence it’s super smooth at adjusting the co2 bubble rate, and it stays put from start to finish. One time my cat knocked over the whole system. The regulator didn’t flinch one bit, nothing broken like nothing happened at all. Impressive quality so you can buy with confidence. Fantastic customer service reps every time.
-
We love it!
We love this regulator, such a vast improvement to the shitty Fzone regulator. Very heavy duty and only a few minutes to install. I did forget to order the GLA tubing but I ordered that and all was good!
-
Much nicer than their competitors I wish I came sooner to buy GLA.
Don’t settle for garbage because that’s what Fzone and Co2art are. My husband was absolutely livid spending money on them. We even argued about it because people talked up those brands. We started with the cheap one from fzone and my god you don’t even have to be experienced in co2 to know right away what poop the quality is. After only 2 months of fiddling we spent even more for Co2art. Wtf do people like about these becouse they are both the same garbage. GLA should figure a way for customers to post photos becouse I shit you not those brands are ripping people off. It’s like they are made of recycled Bud Light cans. They leaked and the bubble counters break off but more noticeable was the lack of fine tuning to the co2 bubble rate. They probably would have been better made out of wood ?. No kidding! Fast forward to now and geez GLA was an instant relief. Very high quality build with substantial weight. You feel the quality right away. Very very nice control of flow and rock steady. We are on our second cylinder refill and could not be more pleased. The ph controller we use from Apex shows us the level of stability via the graphs and GLA has it dialed in! Buy with confidence and go with GLA co2. Save your money!
-
CO2 Regulator
I'll start by saying I owned a Milwaukee regulator which was well over 20 years old and gave me me problems from the very beginning. In my last move the glass bubble counter broke so I had the option of either replacing the bubble counter or going for something new. I opted for the latter and I'm very happy I did. This unit feels beefy and accurate. I made sure I snugged it up well and set it. That's it! It's doing its job for almost two months now and I've had zero issues. Highly recommended.
-
The best!
My 2nd Gro regulator for my basement system. I love these compact Gro regulators, stable like a dual stage regulator, more compact and the flow coefficient of the valve body is like no other. GLA always has the best valves.
-
So happy now that my tank is glowing.
Took the leap into co2 after days of research. I always came back to GLA. The service and this regulator are worth every penny. We love it1
-
Love it!
Super happy with GLA service and products. This kit has been solid as one can ask. Can’t wait to get my hands on their Pro DS. That’s coming up next!
-
Really nice quality for the price!
The quality of the regulator is super nice and has a really nice look to it!
