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
Wednesday, Sep 23
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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
Aquarium CO₂ Regulator Kit Dual Gauge CO₂ Regulator Mini Dual Stage CO₂ Regulator Complete CO₂ Regulator Kit All-in-one kit includes regulator, solenoid, diffuser, bubble counter & tubing High Precision CO₂ Control Fine-tune CO₂ flow precisely. Upgraded seals help prevent leaks for stable use Dual Stage Pressure Control Maintains stable CO₂ flow as tank pressure changes. Adjustable 0-60 PSI output Compact Integrated CO₂ Design Sleek aluminum alloy design combines solenoid and bubble counter in one unit Safe DC Solenoid Design Upgraded 12V DC split-type solenoid delivers safer, more stable CO₂ control Paintball Compatible Design Mini CO₂ regulator fits Paintball tanks, CGA320 cylinders, and 5/8'' cartridges 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: #50,553 in Pet Supplies (See Top 100 in Pet Supplies) #174 in Aquarium Air Pump Accessories
#174 in Aquarium Air Pump Accessories:
Customer Reviews: 4.3 4.3 out of 5 stars (655)
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:
Wednesday, Sep 23
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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Top Amazon Reviews
🚀 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.
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
After having a much cheaper regulator fail and vent a brand new CO2 refill, I bought this one and have been happy with it so far. It's build quality is a drastic improvement over the previous one I had. The valves are quite precise on controlling gas flow and it's easy to get dialed in properly for you needs. The dual valves also are great for getting enough flow into a 75 gallon tank.
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Reviewed in the United States on May 19, 2026 by Kboyer
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
I have been using the FZONE Pro Series Aquarium Dual Stage CO2 Regulator for over four years and have been largely satisfied with its performance. The integrated bubble counter and multiple flow adjustment levers are particularly convenient features that enhance its usability. The quality of the mechanical components is good and they maintain a solid seal after several years. However, I did encounter an issue with the solenoid. After some time, the unit became finicky to turn on, requiring the adapter cables to be in a particular position to hear the click sound, indicating power. Eventually, the red power wire for the solenoid became disconnected, likely due to twisting over years of normal use. This resulted in the solenoid failing to activate. To resolve this, I opened the plastic housing of the solenoid and reconnected the loose red power wire. This quick fix restored the unit to full functionality. It's worth noting that when I initially purchased the regulator, I experienced solenoid issues within the first month. The seller was responsive and promptly provided a replacement, which has been in use since then. Overall, I am pleased with the regulator's performance and features. However, potential buyers should be aware of the possibility of solenoid wiring issues over time. Careful handling of the wiring connections can help prevent such problems. Fortunately repairing the issue in my case was pretty simple. I would rate this product 4.5 out of 5 stars.
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Reviewed in the United States on December 30, 2024 by Amjad Talib
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
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
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
Professional quality. I’ve been running planted tanks for 30 years. The expansion capability is brilliant for all of us MTS folk. Fairly accurate for the price.
Reviewed in the United States on August 3, 2026 by Amazon Customer