FZONE Aquarium Co2 Regulator DC Solenoid with Bubble Counter and Check Valve Plant Grow DIY CO2 System CGA320 Side Open Cylinder

Buyer beware. This regulator solenoid does not shut off CO2. Soon as the product arrived, I read the instructions and installed the regulator on my 5lb CO2 tank. Right out the box, the solenoid was faulty and does not shut off the CO2. I then waited for over 4 hours to see if the bubbles in the bubble counter would stop. It did not. I then tried uninstalling the regulator and double checking my fittings. That did not solve the problem. I have to manually turn off the bubble counter for the bubbles to stop. I did a leak test. There were no leaks. Since my aquarium is still cycling, I have no livestock except for plants. Should I continue to use this regulator, IT WILL KILL MY LIVESTOCK. The instructions are very basic and provide no problem solving. There are some grammatical errors in the instructions and the instructions provide no pictures for reference. There is an Allen Key provided but no instructions on how or where to use this tool. Obviously, the durability of this product is simply not there. The accuracy, it may be accurate but it is very difficult to determine since the solenoid is faulty right out the box. The fit is perfect. Sadly, there are videos and reviews from others that have the same issue. Since some have this problem while others do not, you purchase this product on a gamble that perhaps yours may work. *****Update******* Change 1 star to 5 star. I was able to find a YouTube video by FZone Studios that shows how to take apart the solenoid to adjust the spring. Once I followed what the video instructed, the solenoid now works perfectly. What the video recommends is to take apart the solenoid, check for dirt/dust, unscrew the 2 screws to release the plate, then check the spring and stretch the spring a little bit. Reinstall the plate and solenoid and test to see if the solenoid shuts off the CO2. Once I did this, the CO2 shuts off within 5-10 minutes as the seller stated. The product works perfectly now.

So when I first got this regulator it worked really well and I liked it then when I got my co2 tank refilled recently for whatever reason I came home to it not functioning properly and I didn’t realize it till the next day it didn’t shut my co2 off with the timer like it usually would and nuked my entire shrimp colony at first I thought it was the timer so I got a different timer when using a different timer didn’t fix it that’s when I realized the regulator was the problem so I unplugged it from the timer and it didn’t stop bubbling even with no power going to it so I started removing the hose so it can’t inject anything when I wanted it off and reattaching when I wanted it on and thought I found a solution well it stopped coming on entirely as of last week and that’s when I realized it had a 1 yr warranty since it was past the return date for Amazon so I emailed and messaged fzone on messenger to see which would be better to contact them from and they went above and beyond to help me they said they sent a replacement regulator out and even gonna send some free root tabs as a small gift and I really appreciate it I have no complaints with this company

I was honestly expecting issues based on some of the reviews—lots of people mentioned leaks—but that hasn’t been my experience at all. I’ve had this FZONE CO2 regulator running on my planted tank for a week now and the seal’s been completely solid. No hissing, no pressure loss, nothing. It’s holding a stable output and the fine control on the needle valve is better than I expected, especially for dialing in low bubble rates. One thing that caught me off guard is that it doesn’t come with any CO2-proof tubing. That feels like a bit of a miss. I already had some on hand from a previous setup, but if this is your first regulator, just know you’ll need to buy that separately. Not a dealbreaker, but something I wish was clearer upfront. All in all, if you’re careful with the setup and you use proper tubing, this regulator delivers. Solid build, no leaks, smooth output. I’d use it again on another tank without hesitation. Pros: – No leaks – Holds pressure well, even at low bubble rates – Solid build quality and smooth needle valve adjustment -Nice design Cons: – Doesn’t include CO2-proof tubing – Instructions could be clearer for beginners, including timing (be sure to turn off your co2 when the lights are off)

It's just so frustrating... I purchased this regulator & got it installed less than a week ago. I've purchased FZONE equipment in the past for other aquariums, and I was very pleased with the overall quality of this regulator when I unboxed it. Set-up was very straight forward, and everything was operating normally during this first week that I've had it. Yesterday I heard a hissing sound coming from the regulator. I could tell right away that the issue was not coming from the main connection between the regular and the CO2 tank...That was fine. When I took a closer look, I thought the issue was with one of the threaded connections from one of the gauges, into the metal housing of the regulator. However, this was not the case either. It turns out that the leak was actually coming from the Outlet Pressure Gauge itself! The metal seam along the outside of the gauge was leaking CO2. I'm hoping that this is a case of just a little bad luck...my past experience with FZONE products has been positive. I'm within the Amazon return window, so I will look to get a replacement. If the replacement unit is trouble-free, I'll gladly edit this review rating to something more appropriate. Review Updates (4/26/25): The Amazon return & replacement went process quick and pain-free (as it usually is). The new regulator was installed and running within about day. I would like to specifically comment about the FZONE Customer Service Team. They were incredibly attentive to my issues, and were eager to help me resolve any problems I was having with the regulator. I had several communications with them throughout the Amazon product-return process. Because I was well-within the normal Amazon return window, I chose that route to expedite things. However, after speaking with them on this issue, I'm confident that FZONE would be there to assist me if I needed any assistance during the products warranty period. Please be sure to provide them with the requested warranty information after purchase. I felt these comments were important, because as a frequent Amazon shopper, comments regarding customer service often makes a difference in my purchasing habits.

almost killed everyone in my tank 3x. removed it and bought a different brand. everything is set properly for months, then suddenly the pressure increases to 50psi, fish all gasping for air at the water line.

This works really well on a keg fridge tank that I wasn't using anymore. I would caution to start very low to get the bubble rate correct as this one seems to put more CO2 in the water than those DIY kits that use baking soda and citric acid. This is so much easier, cleaner, and more cost effective long term as well.

I've been doing high-tech planted tanks for nearly a decade years now. When I bought this unit, I did a lot of research to find the best balance of price, quality, and size. Now that I have the FZone, I couldn't be happier, it is exactly what I was hoping for. Overall satisfaction with product: High Impression of build quality: High Product feels very solid. There is no plastic on it. I expect it will last for years to come. Impression of Needle Valve: High I’ve used a lot of needle valves over the years, and this one is the best I’ve used. It has fine grain control over the bubble count; and once set it does not seem to drift. I appreciated the inscription showing which direction to turn; as this is a frustrating guessing game on other regulators. Impression of Regulator: High Adjustment of the regulator is straightforward. Once set; it does not seem to gain or lose output pressure. Impression of Bubble Counter: High It looks clean, professional, and exactly like what you want on your showcase tank. Reading the bubbles is straightforward and consistent. Impression of Pressure Gauge: High The gauges are large, written in psi and kg/cm2, and easy to read. Having the second 'tank' pressure gauge helps identify when the tank is getting low, that way I have the chance to refill it before it runs out. Impression of Relay: High I appreciated the quick-disconnect near the relay; as my electrical strip/outlet is not easy to access. Impression of unboxing/accessories: High The packaging is what I would expect from a high-quality product. It includes a bottle wrench; which I was happy to have when I needed it. I was also pleased to see an extra set of o-rings was included; no manufacturer thinks to do this anymore. Impression of Customer Support : Very High I have reached out to Fzone with minor issues in the past. They responded very quickly and were very personable and helped me with my issue. I was very impressed. Just try to get that kind of customer service or product quality commitment from the big guys! Overall, it’s hard to not see that FZone wants to be the best in the industry. If they continue producing products like this and supporting their customers like they did for me in the past; I believe they will achieve it quickly.

Coming back to write this review after owning it for about 4 years now, and consistently run for about 3 years (roughly about two 1.5 year stretches with a 6 month storage break in a hot garage). This unit is robust and has been pretty solid and it just works. Tonight, the o-ring failed on the unit (hissing at the bottle nozzle and I felt escaping CO2 at the connection between the unit and the CO2 bottle) and I was able to very easily replace the o-ring with the included spares and get the regulator back up and running within minutes. The construction of the unit is not to blame at all, it was just likely time for the o-ring to call it quits. The included extra o-rings are just a smart choice, and the unit overall has been running for about 1.5 years straight on an 8 hour on-16 hour off cycle with it's most recent stint. The solenoid does get very warm but it doesn't seem to have affected the operation over time. Overall I'm very happy with this purchase and the quality of the regulator.

Bel appareil mais dommage que la notice ne soit qu'en anglais.

working well

bin zufrieden damit für den preis,einziges manko das man den arbeitsdruck nicht verstellen kann ,da muss man halt tiefer in die tasche greifen ,vergebe trotzdem 5 sterne weil der druckminderer gut funktioniert und die qualität auch gut ist meiner meinung! noch dazu eintages lieferung! für mich in ordnung!

Es abrir el paquete, conectarlo y empezar a funcionar. No he tenido ningún problema con el kit, que funciona perfectamente, pero posiblemente lo cambie por su versión de dos etapas con dos válvulas de aguja, para que me sirva para dos acuarios. El único inconveniente que le veo a este kit es que no se puede graduar la presión de salida del CO2 y con una presión baja hay difusores que no funcionan. No es el caso de este kit. Dependiendo de lo que uses para diluir el gas en el agua necesitas más o menos presión. Con un reactor de CO2 necesitas poca presión de salida y con un difusor cerámico o de cristal una presión más alta porque el poro que tiene que atravesar es muy pequeño. Yo he utilizado este kit con un difusor y funciona perfectamente. Lo recomiendo.

I recently upgraded to this FZONE regulator, and I’m genuinely impressed! If you are looking for a high-quality CO2 setup but don't want to pay double for a "luxury" brand name, this is the one to get. Build Quality: Right out of the box, it feels incredibly solid. It has a heavy, professional-grade aluminum body and the gauges are clear and easy to read. It doesn’t feel like a "budget" tool at all. Accuracy & Performance: The needle valve is surprisingly precise. I was able to dial it down to exactly 1 bubble every 3 seconds with zero "drift" over time. The 12V DC solenoid is silent and stays cool to the touch, which is a huge plus. Ease of Use: It comes with everything you need—tools, extra O-rings, and a clear manual. Setup took me less than 10 minutes. Customer Support: I had a small question about the solenoid during installation, and the FZONE team got back to me almost immediately. Their support is top-tier and they clearly stand by their product. Bottom Line: Amazing value. It’s rare to find this level of accuracy and build quality at this price point. Highly recommended!