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

This is a solid regulator, very well made. The regulator was easy to install and fits perfectly on a single tank. I really like the lower profile of this regulator so it fits in a tighter space. This regulator does not have a working pressure knob, so expect a slightly higher psi of 50-75.Customer service is also great, quick response times and very helpful!

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

Just installed this for a single diffuser. Now I will see if it holds up over time. Installation was fairly easy (they even included a wrench for the tank connection). Pressure is controlled automatically (unlike FZone Pro series) but it seems to work OK. Bubble counter control is quite sensitive. All in all this looks like a good system if you have no plans to expand later. The Pro series allows for multiple connections to a single tank. This system does not expand.

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: HighImpression of build quality: HighProduct feels very solid. There is no plastic on it. I expect it will last for years to come.Impression of Needle Valve: HighI’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: HighAdjustment of the regulator is straightforward. Once set; it does not seem to gain or lose output pressure.Impression of Bubble Counter: HighIt looks clean, professional, and exactly like what you want on your showcase tank. Reading the bubbles is straightforward and consistent.Impression of Pressure Gauge: HighThe 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: HighI appreciated the quick-disconnect near the relay; as my electrical strip/outlet is not easy to access.Impression of unboxing/accessories: HighThe 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 HighI 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.

This regulator looks solid on the surface, but the solenoid fails at the one thing it’s supposed to do: shut off CO₂ when powered down. I ordered two - both continued bubbling for hours after the solenoid was off and the tank valve closed.Support told me it’s “normal” for CO₂ to keep flowing for 30 minutes to an hour. It’s not. That’s a leak.They even suggested taking the unit apart and stretching the solenoid spring, which is absurd for something brand new.Returned both. If you care about reliable shutoff and livestock safety, skip this model.

Update:Worked perfectly for 6/7 months and it suddenly leaked all of my C02 around where the gauges are..I have to admit, this regulator is rock solid in build quality and performance for the price. One of the best purchases I've made on Amazon.

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)

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.