FZONE Pro Series Aquarium Dual Stage CO2 Regulator Adjustable Output Pressure with DC Solenoid and Integrated High Precision Needle Valve and Bubble Counter | with DC Solenoid and Integrated High Precision Needle Valve and Bubble Counter
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Availability:
Only 5 left in stock, order soon!
Arrives
Friday, Aug 7
Features
- Dual stage construction & adjustable output pressure. Dual stage construction provides stable output pressure regardless of how much CO2 gas remains inside the CO2 cylinder, eliminating unpredictable catastrophes such as an end-of-tank-dump (EoTD). The output pressure is adjustable from 0-65 PSI based on customers different needs.
- Modular manifold block design. Two manifold blocks are included. Each block comes with its own high-precision needle valve and can be operated independently. You may use one block for one aquarium or use both for two aquariums.
- Safety and precision in mind. Our regulator has a built-in safety valve. It will open automatically to release the pressure when it exceeds 100 PSI. The integrated needle valve is precise. The CO2 output can be adjusted to as low as 1 bubble every 3 seconds.
- Solenoid runs on 12V DC instead of conventional 120V AC. This regulator adapts to 12V DC, which is more stable and consumes less power. The solenoid is safe to touch and is very quiet. This solenoid is designed to work with an automatic timer.
- Attention. Suitable for North American CO2 cylinder with CGA320 adapter! Installation tools are included.
Description
Founded in 2018, Fzone creates aquarium products that combine high quality with clean, aesthetic design. What began as a passion grew into a mission — to offer products that are reliable, precise, and visually refined. We focus on CO₂ systems and aquarium accessories that improve plant growth while keeping setups neat and elegant. Thank you for your support — we look forward to growing with you.
Brand: FZONE
Item Form: Gas
Unit Count: 1 Count
Manufacturer: FZONE
Pet Type: Fish
Product Dimensions : 7.56 x 2.56 x 6.69 inches; 2.4 pounds
Item model number : 2020pro
Date First Available : May 22, 2020
Manufacturer : FZONE
Best Sellers Rank: #36,392 in Pet Supplies (See Top 100 in Pet Supplies) #112 in Aquarium Air Pump Accessories
#112 in Aquarium Air Pump Accessories:
Customer Reviews: 4.3 4.3 out of 5 stars (654)
Brand Name: FZONE
Unit Count: 1 Count
Manufacturer: FZONE
UPC: 764595878757
Model Number: 2020pro
Item Form: Gas
Pet Type: Fish
Target Species: Fish
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Friday, Aug 7
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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🚀 Abunda's Overview
This is our summary and key points to consider based on customer reviews.
The FZONE Pro Dual-stage regulator comes highly recommended by many users for its cost-effectiveness, reliability, precise control over CO2 flow, and overall quality. Users appreciate that it can be used with smaller tanks such as paintball tanks as well as larger ones. Some have reported difficulty in adjusting the CO2 rate due to the sensitivity of the needle valves, but the majority seem to find the system works well and facilitates improved plant growth in their aquariums.
Pros
- 👍 Fits both smaller and larger standard CO2 tanks
- 👍 Provides precise control over the CO2 flow
- 👍 Adequate safety measures in design
- 👍 Affordably priced for its functionality
- 👍 Reliable and consistent in CO2 delivery
Cons
- 👎 Needle valves can be difficult to adjust
- 👎 Gauges are not accurately calibrated for aquarium-specific pressures
- 👎 Furthermore, the solenoid lacks a light indicator to easily check if it’s on or off
Should I Buy It?
If you have a moderate to larger size aquarium and are looking to try CO2 injection for improved plant growth, the FZONE Pro Dual-stage regulator is a strong option to consider. Despite some minor drawbacks, its cost-effectiveness and quality performance make it a device that's likely to provide you with good value for your money.
Well I’m so glad a friend of mine who’s super experienced with planted tanks recommended this brand. Not only is this regulator way more affordable than others but the product is pure quality and comes with all the features you want with a high end regulator. Super easy to set up, twist it onto your co2 tank, push on your co2 tubing and push the other end to whatever diffuser you’re using, plug in the regulator, twist on the co2, get the bubbles per second you want and boom, or should I say done, no pun being intended. For me it was especially worth getting the pro model so that I could have the dual checks to stop any end of tank dump and protect my fish. I spent way more than the difference between regulators so why not spend a little more for the peace of mind. It’s also super aesthetically pleasing. Also, I wanted the option to be able to move the regulator around to different tanks if I wanted, particularly multiple 10 gallon grow out tanks I set up in the garage (with the families blessing lmao). This regulator lets you add modules so you can run multiple co2 lines to multiple tanks so you’re not having to get some splitter to attach onto a regulator which would just be opening yourself up to more issues rather than just getting a regulator from the start that allows you to add modules and grow into. I already moved mine from my 55 gallon to my 6 grow tanks and am just going to pick up another regulator. The only downside is you might end up with a few more tanks like me but even friends outside the hobby appreciate seeing 6 grow out tanks that end up looking like dutch style rainbows or epiphyte jungle scapes with the help of co2. I have a near embarrassing amount of houseplants but aquatic plants still blow me away. It’s definitely a game changer, both co2 and having a regulator that is jammed pack with these features. Oh and I recommend just going to your local homebrew store and picking up a 10 lb co2 tank. It looks absolutely incredible with the regulator and it lasts forever. It beats the crap out of anything else on the market both above and below it’s price point. Last thing I’ll say is to the people who are thinking about taking their first steps into co2. Do it. It takes a humble yet beautiful fish keeping hobby to a place where you and your fish are so so much happier. The sheer ease to which you’ll grow plants will make you feel unstoppable and your fish will color up, display brilliant natural behavior and you’ll just get so much more satisfaction seeing an underwater world that you just want to cozy up in or go explore. Anyway, this regulator knocked it out of the park for me. Great company, great selection and dope product. Dang didn’t mean to write so much but I’m friggin pumped.
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Reviewed in the United States on January 20, 2024 by Alex
My dual-CO2 regulator looks nice and operates smoothly. I've been using it in my 20 gallon planted tank for about 2 years until it was damaged in a move. FZone customer service has been very helpful in assisting me. They reviewed my issue and provided several, easy to follow instructions to try and get it working again. Never did they take more than a day to respond. When those methods they suggested did not work, they were quick to offer me a replacement. Me and my aquatic plants enjoy the product, and I really appreciate the way FZone responded when I needed help. Would recommend.
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Reviewed in the United States on June 4, 2026 by charles
I’ve had the FZONE Pro Series CO2 regulator for a while now, and as a first-time CO2 user, it was actually really easy to set up and get running. Connecting it to the tank was easy, and dialing in the bubble rate wasn’t hard either. I like how easy it is to adjust and how stable it stays once it’s set. Being able to run multiple tanks is a big plus for me since I have five tanks. Some use CO2 and some don’t, and you can definitely see the difference in plant color and growth. Overall, it is a solid and reliable CO2 regulator, and I haven’t had any issues with it. Good option if you’re new to CO2. In the photos below, the tank with the black sand and rocks is the one running CO2—that’s what it looked like when I first set it up. The tank with the corys doesn’t use CO2, and you can definitely see a difference in the plant color (even though one has tannins and the other doesn’t). The photo with my betta is a bit older since he’s passed, but it still shows how big the difference can be between tanks with and without CO2.
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Reviewed in the United States on April 22, 2026 by Marisah
Budget CO2 regulator that does the job. Star off for garbage solenoid. It never fully sealed shut. I was able to replace it with a 1/8" NPT pneumatic solenoid from Beduan that does seal completely. The needle gauges are touchy but once they're set, they're set. Overall solid construction.
Reviewed in the United States on January 20, 2026 by Amazon Customer
this is a high quality regulator. allow for future upgrade for multiple tanks. Easy to install and control on the rate for different tank outputs.
Reviewed in the United States on July 4, 2026 by alfpiccolo
This product is trash. I did a dark start and could have had fish day one but decided to wait a few more weeks to ensure the tank was in order, and I am glad I did. After one week the solenoid stopped working, meaning the co2 kept coming and never shut off! I noticed the next morning and my drop checker was pure yellow. ALL MY FISH WOULD HAVE DIED. After wasting days tinkering with it and trying to fix it I gave up and ordered a replacement. While I waited for it to arrive I had to manually close/open the valves and re adjust the bubble counter on my co2 each day twice a day at exact right times to try and maintain some sort of consistency in my tanks. My new plants that were trying to adjust suffered. Once my replacement arrived, I installed the new one, turned it on and drove to the store to return the bad one, guess what? 2 weeks later the new one is having the same issue! Not only is the solenoid junk but I noticed the bubble rates are inconsistent, even when it was working one day its 1 bps the next day its 1.5 or .5. I am done with FZONE. I am returning this junk and going to a pay the extra money for a premium GLA brand. Had I known the time sink and frustrations I would easily have paid the extra 100 bucks for a premium brand to rid myself of this headache.
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Reviewed in the United States on February 21, 2026 by Nick
I have been involved in the aquarium hobby for several decades, but this is the first time I have ventured into the use of CO2 injection for a planted aquarium. I have a 55 gallon freshwater tank that is heavily planted and moderately stocked with fish. I have adequate lighting and add fertilizers to the tank, but needed a source of carbon to facilitate plant growth. After extensive research into various options, I decided to use CO2 injection from a standard 5# CO2 tank, FZONE regulator and a ceramic diffuser. I chose the FZONE Pro Dual-stage regulator for a number of specific reasons. 1. This regulator comes with a standard CGA320 connector that screws onto standard CO2 tanks like the 5# tank I chose. Should you wish to use this regulator with smaller tanks such as paintball tanks, Soda Stream tanks, or even disposable tanks, adapters are available to do so. However, for a 55 gallon tank and larger, standard CO2 tanks are more cost effective. 2. The regulator comes with two stages of regulation and two gauges to monitor tank pressure and delivery pressure. Furthermore, the delivery pressure is adjustable. The dual stage regulator keeps the delivery pressure constant and avoids the possibility of a end of tank surge of CO2 which can harm livestock in the tank. Thus, I do not have to monitor tank pressure on a daily basis. Many regulators come with two gauges but are only a single stage of regulation. Some mini regulators come with only one gauge. Some regulators come with a non-adjustable delivery pressure. 3. The regulator comes with a solenoid that operates on a 12v DC power supply. That is safer than a 120V solenoid when you are working near water. If the power supply does fail, it is easily replaced as 12 VDC power supplies are commonly used for a variety of applications. I have the power supply plugged into a timer such that the CO2 comes on 2 hours before my lighting in the morning and turns off 1 hour before the lights turn off. That insures the plants have an adequate supply of CO2 during the high-growth period, but CO2 does not build up to excessive levels at night when plants cannot consume it. The solenoid does cut off the CO2 flow completely when the power is off. 4. The regulator comes with not just one, but two needle valves and accompanying bubble counters with check valves built in. These appear to be precision machined valves that provide precise control over the CO2 flow. They seem to be quite stable in that when the CO2 comes on in the morning, the flow rate is the same as it was the previous day. I have mine set for about 90 bubbles per minute, but you might need more or less depending upon your tank size, water chemistry and plant requirements. I am only using one of the needle valves, but you can connect a second tank, or reserve it as a spare in case the first one fails. The check valve insures that tank water does not back up into the needle valve and regulator when the CO2 flow is stopped at night. This avoids one potential maintenance issue. 5. When I had my CO2 tank filled, the supplier provided a couple of nylon washer. However, I found that these washer were not thick enough to provide a good seal between the tank and the regulator. The thicker washer provided with the regulator worked perfectly. 6. I have not had the unit long enough to verify its long term durability, but considering I should only have to refill the CO2 tank every 4-6 months and I do not have to make routine adjustments to the needle valve, I predict that the system will last a long time. The most likely maintenance issues may be the solenoid and power supply; both of these are easily replaceable should the need arise. 7. Lastly, the system seems to be fairly priced. Most dual-stage regulators are significantly more expensive than the FZONE. Since I have not used CO2 injection previously, I did not want to spend $200-300 for a regulator alone. I do recommend this unit to anyone with a 40 gallon and larger tank who wants to begin using CO2 injection. For tanks smaller than 40 gallons, this is probably more system than is required, but it suits my 55 gallon setup quite well.
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Reviewed in the United States on September 26, 2020 by RayClem
There are a number of regulators out there for the aquarium use and they tend to fall into one of two categories: affordable and very expensive. The expensive ones ($400+) are usually the ones made by hobbyists who really know what they are doing. They use top of the line regulators and needle valves. The needle valves alone on those can cost more than this entire system. Those are hands down the best...but at the end of the day do they perform better? Not necessarily. This model from FZone gets the job done effectively. It delivers the CO2 your tank needs and offers the protection and convenience the more expensive ones provide. I would recommend this one to all but the most picky and discerning. What do I like about this one? -the manifold design is great for adding multiple aquariums and using one CO2 tank and regulator. This design makes it much easier than using splitters on other regulators. -It looks nice and is good quality. More on that later. -it is fairly reliable. The bubble rate and CO2 levels are consistent even after cycling on/off -The price is right! It is nearly identical to others out there. Many of the components are likely from the same factory. What is bad about it? -needle valves are terrible. Very hard to adjust CO2 rate. It works, but is hard to dial in. It need to barely apply pressure and I don't even detect it turning to fine tune it. Its probably a 1/100th of a turn or less to go from 30bpm to 60bpm. I am using it on a 5 gallon tank that needs 35-40 bubbles per minute (bpm). I did get it dialed in, but the needle on this has a high Cv factor. The Cv factor determines the flow rate. On the $100 needle/meter valves you can turn the dial a complete turn and go from 10bpm to 60bpm, maybe even less. Some of them top out around 120 or 180 bpm (2-3bps). A quality meter/needle valve with markings would be AMAZING and the single best upgrade. I may just do this on mine, its worth it. -the gauges are not the right range. The tanks we use are around 850PSI when full. We run 20-30PSI working pressure. The gauges should be 0-2000 for the tank and 0-100 (or less) on the working side. Gauges are most accurate around the 50% range. Both ends of the range are not accurate. With the pressures we use, these gauges are working in the less accurate range. So 25PSI today may not be 25PSI next time you have to adjust it. -The solenoid could use less power. It runs at 4.3 watts. My FZone mini runs at 1.3Watts. -The solenoid needs a light to indicate it is on (open). This was great on my my mini. I could easily see if it was open or closed. So thats it. Its a very good value and gets the job done. I would definitely pay more if they had a new version with good meter/needle valves with low Cv and gauges that are designed for the pressures used in aquarium CO2. However, at the end of the day I can get it dialed in and have it working for weeks/months and my plants and livestock won't care.
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Reviewed in the United States on September 29, 2021 by RyanD