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

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 designCons:– 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)

This product is of good build quality and works exactly as I expected.Set-up time was short and simple. It also came with the Spanner and extra O-rings and I did not have to go to the hardware store to buy one or worry about the size

The media could not be loaded. So far so good. Nice build quality, and a great value. I have it hooked-up to a lightly planted nano tank at the moment, so I have it dialed down to 1 drop per 5 seconds, as advertised. Too early to say if it will drift, but I am very pleased. Putting out 55psi working pressure to the bubble counter, plenty to move the inline diffuser.

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.

Solenoid valve on my unit would not close after unplugged. After you plug it in initially it just....stays open forever, I guess. Unplugged, waited half an hour--no change, co2 just kept flowing. Plugged it back it, unplugged again. No change. Obviously defective. Fortunately I am able to return it for a refund. Pretty irritated that this halted all progress on my aquarium this weekend though.