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This item is eligible for return within 30 days of receipt
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Availability:
In Stock.
Arrives
Sunday, Nov 15
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At a glance
- Condition
- New
- Size
- 5L
- Dimensions
- 3.6 x 3.6 x 18.9 in; 6.68 lb
- Item Form
- Gas
- Pet Type
- Fish
- Target Species
- Aquatic Plants
- In the box
- CO₂ Generator kit
Features 5
- High-Efficiency CO2 Supply System: FZONE CO2 generator system uses a citric acid and sodium bicarbonate reaction to produce high-purity CO2, delivering stable pressure and flow through a CO2 regulator, bubble counter, and CO2 diffuser. Unlike traditional cylinder systems, it requires no refilling at CO2 stations, making it more convenient.
- Enhanced Safety Design: The FZONE aquarium CO2 system is made from food-grade 304 stainless steel with body 50% thicker for greater strength and pressure resistance. The CO2 system includes a manual shut-off valve for safe control when CO2 is not needed, and an automatic pressure-relief valve that releases excess pressure when it rises above the safe limit,providing dual safety protection for worry-free operation.
- Precise and Reliable CO2 Control:The FZONE CO2 generator for plants use a precision needle valve for smooth, accurate flow adjustment. The bubble counter provides a clear view of CO2 injection rate, while the pressure gauge displays real-time tank pressure. Its upgraded all-in-one solenoid minimizes connections and leak risks, ensuring stable, consistent CO2 delivery for your planted aquarium.
- Ready to Use: This complete aquarium CO2 kit is designed for easy setup and convenience. It includes all essential accessories CO2 diffuser, check valve, U-connector, suction cups, tubing, funnel, syringe, sealing rings, and power adapter no extra parts required. Just add the raw materials (not included) and youre ready to go.
- Easier Use and Maintenance :The DIY co2 reactor kit features an upgraded external thread design that prevents residue buildup, making cleaning simple and smooth. The bottle opens effortlessly without sticking, and the built-in fill port lets you add water directly with a syringe no need to unscrew the cap, saving time and effort.
Description
— Enjoy the Art of Aquascaping 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. FZONE CO₂ generator system, uses a citric acid and baking soda reaction to produce high-purity CO₂, delivering stable pressure and smooth flow through the regulator, bubble counter, and diffuser, delivering a stable and continuous CO₂ supply to support healthy plant growth in your aquarium. The FZONE Upgraded CO₂ Generator System is your perfect choice. It’s safe, easy to use, and ready right out of the box — providing a steady CO₂ supply for lush, vibrant plant growth. Solves the common problem of the regulator becoming hard to unscrew when replacing reactants Reduces connection points, minimizing CO₂ leakage risk and ensuring a more stable, reliable system Features a manual shut-off and pressure relief valve for dual safety protection
Specs 14
| Brand | FZONE |
|---|---|
| Item Form | Gas |
| Number of Packs | 1 |
| Unit Count | 1 Count |
| Manufacturer | FZONE |
| Product Dimensions | 3.6 x 3.6 x 18.9 inches; 6.68 pounds |
| Item model number | FZ-GNRT |
| Brand Name | FZONE |
| Number of Items | 10 |
| Item Highlight | Stable CO₂ Output, 304 Stainless Steel, All-in-One CO₂ Solenoid Valve, CO₂ Diffuser, CO₂ Tubing, Bubble Counter, Safety Valve |
| Model Number | FZ-GNRT |
| Warranty Description | 1 |
| Pet Type | Fish |
| Target Species | Aquatic Plants |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, Nov 15
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
Great Kit
Size: 2.5L
Wife got this for me for my birthday. I love it. Easy to set up, easy to use. I didn't like the look of the diffuser that comes with it, but it worked fine. The only criticism I have is that the reaction information they have is scientifically wrong, however those measurements are easily found. Still 5 stars love this thing.
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Reviewed in the United States on October 3, 2026 by Nanaki
Great overall, upgrade the diffuser
Size: 2.5L
Bought this to provide CO2 to my new 10gal shallow planted tank. Ingredients were easy enough to source, directions are included on a sticker that can be attached to the tank, assembly is very straightforward. Components all seem to be good quality, and it fits well behind my tank. I will say that it had to sit overnight to build pressure, and didn't pressurize within the 1-2hrs that the directions said. For $72 (before tax) this is a much cheaper and more sustainable option than refilling CO2 tanks at the store. I tried the diffuser it came with but it's not the greatest, worked ok for a few days but it's basic plastic. I swapped it out for a UNS inline diffuser and I'm much happier with that. The included diffuser was tricky to drain- I ended up using the included syringe to force the water out, since it has no way to disassemble it. Not sure how long the ceramic pad is supposed to last on it, but note that it can't be swapped out and the whole diffuser would need to be replaced. Would absolutely recommend overall, great little system that is beginner-friendly.
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Reviewed in the United States on July 10, 2026 by Ryan
Works great! Accessible CO2 for any aquarium
Size: 2.5L
Great system and super easy setup! The instructions are right there on the canister label so I don't have to look it up every time. This co2 system works wonderfully and is an accessible way to add CO2 to any aquarium. I have a few plants that require CO2 but all of the plants in general are loving it.
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Reviewed in the United States on July 11, 2026 by hootie huey
Great purchase
Size: 2.5L
I did a lot of research before buying this CO₂ kit, and it turned out to be a great purchase. I was worried it would be very complicated, but actually it was easy and even enjoyable to set it up. I had a couple of questions for customer service about the extra piece (airline check valve), which apparently is not needed because the diffuser already has one. Also, my diffuser stopped working, and apparently it was due to a pressure drop before the tank was almost empty. Customer service was very helpful in troubleshooting everything.
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Reviewed in the United States on April 17, 2026 by Kalista
Stops working
Size: 5L
Pretty easy to use. However stopped working immediately, first the solenoid went out within a month of having it. Then the chambers are clogged and now it won’t produce any bubbles or anything at all. I wouldn’t recommend
Reviewed in the United States on July 24, 2026 by Holly C.
Best CO2 reactor kit on the market
Size: 2.5L
This kit is amazing!!! I’ve had it set up for a little over a week now and can already tell a difference in my plants!! The set up was super easy and I can tell the components in the kit are very durable. I’ll say the adjustment knobs seem a little touchy but in my field of work I’m use to touchy adjustments so no big deal to me! Will definitely buy more for my other tanks
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Reviewed in the United States on July 8, 2026 by Cody James
Good when it works
Size: 5L
A good system with a few plastic parts. I've had problems getting the system to run correctly every day. When it works it works well with tiny bubbles as desired. It stopped working and I couldn't figure out why until I used a soapy water mixture to test the connections. The one way valve which is plastic was leaking air preventing it from working. I've ordered a new metal valve and hopefully it will fix my problems.
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Reviewed in the United States on March 19, 2026 by Sean
A good looking CO2 generator, with acceptable accessories.
Size: 5L
Most important note is; I have not used it. I set up a 75 gallon Salt and that was its target, but I quickly decided to turn that Salt into a 2nd Cichlid tank. Now it's for sale on E-Pray!
Reviewed in the United States on September 16, 2026 by Randy Browning