In Stock

GLA PRO-1 Aquarium CO2 Regulator (Modular Manifold)

11 reviews Write a Review
GLA PRO-1 Aquarium CO2 Regulator (Modular Manifold)
GLA PRO-1 Aquarium CO2 Regulator (Modular Manifold)
Current Stock:

Frequently Bought Together:

GLA PRO-1 Aquarium CO2 Regulator (Modular Manifold)
Inc. Sales Tax (Florida Only)
Ex. Sales Tax (Florida Only)






Pressure Reduction



CO2 Distribution



GLA PRO-1 Aquarium CO2 Regulator (Modular Manifold)

Our GLA PRO-1 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.

GLA PRO modular CO2 regulators have paved the way in adaptive CO2 distribution. Our innovative modular manifold allows you to add (or subtract) manifold blocks with ease, so you can expand CO2 supply, independently controlled, to multiple aquariums. Our modular CO2 regulators flawlessly and easily adapt to the expansion of your aquarium system, allowing you to use one regulator for multiple tanks, so you can save money and installation footprint. When you invest in our modular CO2 equipment, you get a single regulator that can grow with you and last for years of planted aquarium enjoyment.

  • Premium industrial and traditional style regulator body
  • Stainless steel inlet filter and sealed valve cartridge for precise regulation of flow
  • Forged brass and die cast for durability and accurate machining
  • Multistage stainless steel micron filtration inlet and outlet
  • Integrated pressure relief valve (PRV)
  • 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
  • Premium quality pneumatic components
  • Dual gauge (tank volume and working pressure)
  • No end-of-tank dumps
  • Custom designed, pressure tested, and leak tested in the USA
  • 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 - 160 PSI
  • Tank/High Pressure: 0 - 2000 PSI
  • Modular Manifold: One block manifold provides CO2 to single aquarium, expandable to multiple aquariums (easily add or subtract manifold blocks to provide CO2 to multiple aquariums)
  • Includes: one nylon seal

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



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.

Customer Reviews

11 reviews

  • 5

    GLA PRO-1 CO2 Regulator

    Posted by Randy on 20th Mar 2022

    A step way above my last regulator, high quality and worth the price in my opinion. Great customer service.

  • 5

    best of the best

    Posted by vincent nguyen on 28th Jun 2021

    it is very good

  • 5

    The only UL Listed aquarium regulator on the planet.

    Posted by Ethan Rainer on 12th Apr 2021

    We looked far and wide to find a good source for regulators for our laboratory. Finding GLA was a blessing because out other alternative was going to cost us 10x more. We test equipment that builds large incubators to grow green algae with the end result beings biofuel production. We now have 8 of these Pro series regulator in use and could not be more happy. The guys at GLA are top rate. Quality is unmatched, that goes without saying being UL listed equipment.

  • 5

    Quality through and through.

    Posted by California Academy of Sciences on 21st Mar 2021

    GLA has countless co2 systems throughout our facilities. We have been using GLA co2 systems all over the park and we could not be happier. We have been using GLA co2 systems for years, all backed by the tremendous team at GLA. Thank you guys!

  • 5

    Quality regulator and very heavy duty

    Posted by Ryan on 11th Aug 2020

    I have real working knowledge of CO2 and regulators, I went with GLA because those who owned GLA regulators swore by them and really love them. They are certainly quality regulators. If you have owned any generic brand before, forget what you know about quality co2 systems because GLA has set the bar. This was easy to see since they invented the modular manifold years ago, now china is producing knock offs. I did look at co2art, but if you pay attention you will notice something. They mention in co2art the regulator is made in Germany, its 100% made in China. How do we know this? Because you now see the same regulator rebranded under many other names sold out of China. Shame on Co2art for lying to customers about where their product is made... Congrats GLA for staying the source and building US made products.

  • 5

    Best Regulator I’ve Used

    Posted by Zeke on 13th Feb 2020

    This regulator is amazing. Sturdy. Made of brass (and not chrome). Dials in super-accurately and stays there. I can’t recommend this enough. Invest in this to start with and avoid the headaches that come with other regulators.

  • 5

    The best of the best in co2 equipment

    Posted by Ramon Rodriguez on 12th Feb 2020

    You likely landed on GLA for your co2 system because you heard they were the best. Thats what brought me to GLA. I purchased this Pro-1 in July of 2019. Its been perfect since day one. I have a few other regulators I can compare it with and GLA is in a class of there own. This Pro-1 is super super heavy duty in all aspects. It weighs about 4x as much as any other regulator I own, its also significantly larger so Im sure that has a lot to do with it. Solenoid and needle valve have been spot on and super smooth. You can totally tell this co2 regulator is 100% built in the USA. Its also UL approved. What is not to love about that?! Good luck trying to find another brand thats UL approved lol. GLA is the best of the best in Co2 equipment.

  • 5

    GLA Pro1

    Posted by Jason Kosater on 13th Jan 2020

    This regulator has never given me a single issue. I'm actually just here to buy another modular block because I'm setting up a new tank. Disclaimer: I've begun to have a growing love for mechanical things with no overlying software to introduce unreliability for no discernable reason. I've begun my decent into grumpy old man. I bought this thing here about 4 years ago ,got a filled 20 lb CO2 tank from the hydro store ,hooked it up to a 20 long, plugged it in and it's still running on the same cylinder ( the tank readout needle has barely moved) without a hiccup as I write this. It's nice to spend the extra money on a something and be more than completely satisfied with the purchase. To me this is a no brainier, high quality, made in the USA and between it's reliability and the fact that after dial in with nutrients, I don't even think about algae anymore , if you're on the fence get off of it.

  • 5

    Pro definitely describes this regulator

    Posted by Jay Friends on 6th Jul 2019

    From packaging to instalation everything was full proof. The regulator was packaged in a box along with other items i ordered using form fitted foam. Nothing was damaged in transit do to this style of packing. They give you step by step instruction to install this regulator correctly that are easy to follow. I also got a couple of GLA tools with my order and the quality was outstanding. The real difference between GLA tools and Amazon tools are the quality and the comfort when using them. I will never spend money on an Amazon regulator again. Spending a little more on a quality regulator will save you money in the long run as i have had cheaper regulators fail time and time again.

  • 5

    A solid build !

    Posted by Pierre on 7th Mar 2019

    Shipping was great, and most importantly the way it was packaged, was unbelievable. Totally bullet proof. Well wasn't expecting anything less from a reputable company like GLA. Been away from planted tanks for few years now, and finally I'm ready to do it again. I set it up last night, and honestly comparing it to the regulators that I've had before, there is no comparison. It's a very solid unit and very consistent. I defiantly will have an updated review in the next few months. Thank you GLA.

  • 5

    Nice regulator

    Posted by Aleksei on 11th Feb 2019

    It's a nice quality regulator. I had to adjust the working pressure to 33 psi before fine tune started working. When I first tried less than 33 psi on accident - it wasn't working. GLA gave me badass scissors and tweezers with it - I'm in love with both the instrument and tools. Twizzers are much better that those I had in a dental office when I worked as a dentist for a while - very precise. I wish the hombre who was replying to my email would had his head in the right place - I asked for a chemical to bring my DI water back to normal - he told me he would add it to my order, but I never received the thing... And now, following the commandments given me by my Jewish grandma, it hurts my soul to think that I would have to make another order and pay 15 dollars for shipment just to get the can of that stuff... All-in-all the regulator was an excellent purchase - much better than some shoddy Chinese regulators. Buy the inline ceramic diffuser with it - to get the best result.

Join the List