--- product_id: 524278183 title: "FZONE 5.5L Aquarium CO2 Generator System Carbon Dioxide Reactor Kit with Regulator and Needle Valve for 600-800g Raw Material" brand: "fzone" price: "¥56443" currency: JPY in_stock: true reviews_count: 13 category: "Fzone" url: https://www.desertcart.jp/products/524278183-fzone-5-5l-aquarium-co2-generator-system-carbon-dioxide-reactor store_origin: JP region: Japan --- # 12V DC solenoid timer-ready for custom CO2 cycles Precision needle valve with bubble counter, steady 1 bps 1.5mm SUS304 steel, 25% thicker for max safety FZONE 5.5L Aquarium CO2 Generator System Carbon Dioxide Reactor Kit with Regulator and Needle Valve for 600-800g Raw Material **Brand:** fzone **Price:** ¥56443 **Availability:** ✅ In Stock ## Summary > 🌿 Elevate your aquarium’s ecosystem with precision CO2 mastery! ## Quick Answers - **What is this?** FZONE 5.5L Aquarium CO2 Generator System Carbon Dioxide Reactor Kit with Regulator and Needle Valve for 600-800g Raw Material by fzone - **How much does it cost?** ¥56443 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/524278183-fzone-5-5l-aquarium-co2-generator-system-carbon-dioxide-reactor) ## Best For - fzone enthusiasts ## Why This Product - Trusted fzone brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Backflow Protection:** Integrated check valve prevents water from damaging your CO2 tank, extending equipment life and reliability. - • **Complete DIY System:** All-in-one 5.5L kit includes regulator, needle valve, and bubble counter—engineered for seamless setup and professional results. - • **Precision CO2 Control:** High-accuracy needle valve with built-in bubble counter ensures flawless, steady CO2 injection tailored to your aquarium’s needs. - • **Smart Timer Compatibility:** 12V DC solenoid valve lets you automate CO2 dosing on your schedule, optimizing plant growth and energy use. - • **Industrial-Grade Durability:** Thick SUS304 stainless steel bottle withstands up to 1137 PSI pressure for ultimate safety and longevity. ## Overview The FZONE 5.5L Aquarium CO2 Generator System is a professional-grade DIY kit featuring a robust 1.5mm thick SUS304 stainless steel bottle capable of withstanding pressures up to 1137 PSI. It includes a precision needle valve with an integrated bubble counter and check valve to ensure steady CO2 delivery and protect your equipment. Designed for 12V DC solenoid compatibility, it allows customizable CO2 injection timing to optimize aquatic plant growth. Ideal for aquarists seeking reliable, safe, and efficient CO2 generation for tanks requiring 600-800g of raw material. ## Description desertcart.com : FZONE 5.5L Aquarium CO2 Generator System Carbon Dioxide Reactor Kit with Regulator and Needle Valve for 600-800g Raw Material : Pet Supplies Review: CO2 made simple for the first time user - I'm a first time CO2 user and this is my second venture into the aquarium hobby. My first go round, I always wanted an nice lush planted tank but I was in my early teens and couldn't afford the size tank or the items required for that kind of setup. Now on my second go round, I decided to follow that path of my dream aquarium and with that came the initially overwhelming prospect of CO2 systems. The Fzone CO2 generator system has made that very simple and significantly less daunting for me. It comes with almost everything that you need to set up the system. The only things the system doesn't come with is sodium bicarbonate, citric acid, a digital scale, or check valves. I highly recommend you spend a couple dollars on check valves. Those check valves will keep water from backflowing into the co2 lines when you have the system off. If you want to make your life super simple, you will need them. They also allow you to easily disconnect the bubble checker when it comes time to refill the bottle with your baking soda and citric acid. Now, I did say I'm new to CO2 so I did make a mistake when filling the bottle. The directions specifically state to hold the bottle at a 45 degree angle when filling. I did this until I went to grab the cap. When I reached for the cap of the tank I set the canister straight up, which meant I ended up having a fountain of the chemical reaction shoot out of the top of the tank until I was able to screw the cap onto it. Don't make the same mistake I made. That was my own mistake I made, like I said I knew it had to be held at an angle and I had an airheaded moment. Now I will say, if you have a larger tank, go for the 5L kit. I have a 75 gallon and I have had the CO2 on a timer, and my tank pressure has gone from 400+ PSI when freshly full to 150 PSI in 4 days. I will most likely need to upgrade to the 5L bottle here in the next month or so, but I also have my system running for 11hrs a day. As stated, the tank pressure goes up to over 400PSI, which already tells me that the build quality is quite superb, and I noticed some other reviews state that the knob to adjust the bubble flow was a bit touchy. My specific system was just touchy enough to where it was actually pretty easy to set my flow rate at 3 bubbles a second without really struggling with having to fiddle around with it. The tank is pretty weighty, but I believe that's due to the fact that it is built very well. When you initially fill the tank it will get cold enough to condensate on the outside, but that is due to the chemical reaction. It's not a flaw. Overall the 2.5L was perfect for me to dip my toes into the beautiful world of planted tanks, and is good value for people who have a smaller setup, such as a 29G or less. For my specific use case, I will need the 5L so I don't have to refill every week. Review: This is a great CO2 generator - Fzone has fantastic customer support (thank you Cheryl). I was missing the white piece on my filter and they sent me a new filter. I have used an fzone regulator on a paintball tank previously, but I had a stroke, and it's no longer possible for me to go get CO2. Therefore, I looked for a CO2 generator and was happy to find that fzone had this one Because of my previous familiarity with using CO2, despite the horrible instructions, it was quite easy to get set up and get started. This unit came with a solenoid which works perfectly. I have it on a timer to turn on in the morning and shut off at night. I replaced the diffuser with one from clscea (stainless steel, widen hook 25cm) which works much better, especially for rimmed tanks. The supplied funnel's base is too narrow to be of real use (fzone please replace this). This unit no leaks, it's looks great, runs quietly, gives me great value for money, and I have to trim my stem plants more often now and my plants look fantastic Fzone makes great products and I will buy from them again. ## Features - Professional DIY Kit: a complete system in 5.5L size bottle, that includes SUS304 stainless bottle, regulator, precision needle valve, and easy adjustable bubble counter - Safe: the bottle body is made of 1.5mm thick SUS304 stainless steel (25% thicker than normal 1.2mm bottle); it can sustain pressure up to 80kg/cm2(or 1137 PSI); safety valve will open automatically when the inside pressure exceeds the safety threshold - Needle Valve with Bubble Counter: high precision, aquarium specific needle valve provides accurate fine-tuning; steady 1 bps is achievable; bubble counter with check valve built-in; it stops water from back flowing into your CO2 tank (protects your CO2 tanks from rust and corrosion) - 12V DC Instead of AC Power: having the solenoid on a timer( not included), you can specify when you want CO2 injection on and for how long - Attentions: the required powders to generate CO2 gas are not included; you will need purchase the citric acid and sodium bicarbonate powders separately. Fzone will offer a round-the-clock service, and you can reach out to us at any time for any product-related concerns. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08THYYFMN | | Best Sellers Rank | #71,814 in Pet Supplies ( See Top 100 in Pet Supplies ) #259 in Aquarium Air Pump Accessories | | Brand | FZONE | | Brand Name | FZONE | | Customer Reviews | 4.2 out of 5 stars 1,001 Reviews | | Item Form | Liquid | | Item Weight | 3.24 kg | | Liquid Volume | 5.5 liters | | Manufacturer | FZONE | | Manufacturer Part Number | FZ-4LKIT-US | | Model Number | FZ-4LKIT-US | | Number of Items | 1 | | Number of Packs | 1 | | Pet Type | Fish | | Target Species | Fish and Plants | | UPC | 764595876395 | | Unit Count | 1 Count | ## Product Details - **Brand:** FZONE - **Item Form:** Liquid - **Item Weight:** 3.24 kg - **Liquid Volume:** 5.5 liters - **Number of Packs:** 1 ## Images ![FZONE 5.5L Aquarium CO2 Generator System Carbon Dioxide Reactor Kit with Regulator and Needle Valve for 600-800g Raw Material - Image 1](https://m.media-amazon.com/images/I/61WHFAHGpsL.jpg) ![FZONE 5.5L Aquarium CO2 Generator System Carbon Dioxide Reactor Kit with Regulator and Needle Valve for 600-800g Raw Material - Image 2](https://m.media-amazon.com/images/I/71Q1DiRwFzL.jpg) ![FZONE 5.5L Aquarium CO2 Generator System Carbon Dioxide Reactor Kit with Regulator and Needle Valve for 600-800g Raw Material - Image 3](https://m.media-amazon.com/images/I/71KDBPYM7xL.jpg) ![FZONE 5.5L Aquarium CO2 Generator System Carbon Dioxide Reactor Kit with Regulator and Needle Valve for 600-800g Raw Material - Image 4](https://m.media-amazon.com/images/I/515EbCrL2HL.jpg) ![FZONE 5.5L Aquarium CO2 Generator System Carbon Dioxide Reactor Kit with Regulator and Needle Valve for 600-800g Raw Material - Image 5](https://m.media-amazon.com/images/I/71ya6H+f8nL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: What is the reason for needing a solenoid? How will the system run without one?** A: The solenoid will control the co2 output. When turn off the solenoid, there will not be co2 out from the generator. If without the solenoid, the co2 will keep output. **Q: How long do I have to wait before using the set up in my tank?** A: You can use it as soon as the needle is in the green. **Q: How can i replace the needle valve. Mine is broken alternating between full throttle or 0?** A: This isn’t a replacement part for the co2 generator it’s valve for a co2 tank. I recommend contacting the manufacturer. **Q: For a 4l co2 generator, should i put in 600-800 gram each of material a&b? also do i pour in 300ml water or more? i've read different opinions online.** A: I use 600 ml for the material each and 800 ml of water I freeze the water in try"s that make long round ice cubes the cube are made to put in water bottles ## Customer Reviews ### ⭐⭐⭐⭐⭐ CO2 made simple for the first time user *by H***R on June 17, 2025* I'm a first time CO2 user and this is my second venture into the aquarium hobby. My first go round, I always wanted an nice lush planted tank but I was in my early teens and couldn't afford the size tank or the items required for that kind of setup. Now on my second go round, I decided to follow that path of my dream aquarium and with that came the initially overwhelming prospect of CO2 systems. The Fzone CO2 generator system has made that very simple and significantly less daunting for me. It comes with almost everything that you need to set up the system. The only things the system doesn't come with is sodium bicarbonate, citric acid, a digital scale, or check valves. I highly recommend you spend a couple dollars on check valves. Those check valves will keep water from backflowing into the co2 lines when you have the system off. If you want to make your life super simple, you will need them. They also allow you to easily disconnect the bubble checker when it comes time to refill the bottle with your baking soda and citric acid. Now, I did say I'm new to CO2 so I did make a mistake when filling the bottle. The directions specifically state to hold the bottle at a 45 degree angle when filling. I did this until I went to grab the cap. When I reached for the cap of the tank I set the canister straight up, which meant I ended up having a fountain of the chemical reaction shoot out of the top of the tank until I was able to screw the cap onto it. Don't make the same mistake I made. That was my own mistake I made, like I said I knew it had to be held at an angle and I had an airheaded moment. Now I will say, if you have a larger tank, go for the 5L kit. I have a 75 gallon and I have had the CO2 on a timer, and my tank pressure has gone from 400+ PSI when freshly full to 150 PSI in 4 days. I will most likely need to upgrade to the 5L bottle here in the next month or so, but I also have my system running for 11hrs a day. As stated, the tank pressure goes up to over 400PSI, which already tells me that the build quality is quite superb, and I noticed some other reviews state that the knob to adjust the bubble flow was a bit touchy. My specific system was just touchy enough to where it was actually pretty easy to set my flow rate at 3 bubbles a second without really struggling with having to fiddle around with it. The tank is pretty weighty, but I believe that's due to the fact that it is built very well. When you initially fill the tank it will get cold enough to condensate on the outside, but that is due to the chemical reaction. It's not a flaw. Overall the 2.5L was perfect for me to dip my toes into the beautiful world of planted tanks, and is good value for people who have a smaller setup, such as a 29G or less. For my specific use case, I will need the 5L so I don't have to refill every week. ### ⭐⭐⭐⭐⭐ This is a great CO2 generator *by A***I on October 8, 2024* Fzone has fantastic customer support (thank you Cheryl). I was missing the white piece on my filter and they sent me a new filter. I have used an fzone regulator on a paintball tank previously, but I had a stroke, and it's no longer possible for me to go get CO2. Therefore, I looked for a CO2 generator and was happy to find that fzone had this one Because of my previous familiarity with using CO2, despite the horrible instructions, it was quite easy to get set up and get started. This unit came with a solenoid which works perfectly. I have it on a timer to turn on in the morning and shut off at night. I replaced the diffuser with one from clscea (stainless steel, widen hook 25cm) which works much better, especially for rimmed tanks. The supplied funnel's base is too narrow to be of real use (fzone please replace this). This unit no leaks, it's looks great, runs quietly, gives me great value for money, and I have to trim my stem plants more often now and my plants look fantastic Fzone makes great products and I will buy from them again. ### ⭐⭐⭐⭐⭐ It's a good tank. *by K***P on April 24, 2024* No seal problems, all parts there, instructions are mostly good. If you dont have a scale, you'll need to do a little math. I added 13.8 Tablespoons Baking Soda, and 8.3 Tablespoons Citric Acid with my 300ML water and it seems to be working out... but again do your own math and make sure do NOT take my word for it. It's been a few weeks and my plants seem happy and my fish are alive so those measurements haven't killed my 29G just yet... Anyways, the setup seems ideal and is decent price as far as I can tell. It does the job well, and hasn't failed me yet. Seems like it's decently made so I'm happy with my purchace. Would buy from this seller again. On a final note... buy a CO2 drop checker. I did some math and figured 1 bubble per 2 seconds was good.... now I'm using 4 bubbles per 1 second. It will help you figure out how much to be adding to your tank and save you mental stress trying to guess. Just take it SLOW and figure out what rate gets your checker green fastest and keeps it green without going into the yellow (danger) zone. ## Frequently Bought Together - FZONE 4 L Aquarium CO2 Generator System Carbon Dioxide Reactor Kit with Regulator and Needle Valve for 600-800g Raw Material - Milliard Citric Acid 5 Pound - 100% Pure Food Grade Non-GMO Project Verified (5 Pound) - ARM & HAMMER Baking Soda Made in USA, Ideal for Baking, Pure & Natural, 2.7lb Bag --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/524278183-fzone-5-5l-aquarium-co2-generator-system-carbon-dioxide-reactor](https://www.desertcart.jp/products/524278183-fzone-5-5l-aquarium-co2-generator-system-carbon-dioxide-reactor) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-09-15*