--- product_id: 292869952 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: "€ 357.61" currency: EUR in_stock: true reviews_count: 13 category: "Fzone" url: https://www.desertcart.gr/products/292869952-fzone-5-5l-aquarium-co2-generator-system-carbon-dioxide-reactor store_origin: GR region: Greece --- # 12V DC solenoid timer for customizable CO2 injection 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:** € 357.61 **Availability:** ✅ In Stock ## Summary > 🌿 Elevate your aquarium game with precision CO2 control—because your plants deserve the spotlight! ## 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?** € 357.61 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/292869952-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:** Innovative check valve design prevents water from damaging your CO2 tank, extending the life of your investment and keeping your setup pristine. - • **Precision CO2 Control:** Fine-tune your aquarium’s CO2 flow with a high-accuracy needle valve and integrated bubble counter, ensuring steady, reliable dosing every time. - • **Smart Timer Compatibility:** 12V DC solenoid allows you to schedule CO2 injection with ease, syncing perfectly with your aquarium’s natural light cycle for optimal plant growth. - • **Industrial-Grade Durability:** Crafted from 1.5mm thick SUS304 stainless steel, built to withstand pressures up to 1137 PSI—because your aquatic ecosystem deserves the best. - • **Complete DIY Kit with Warranty:** Everything you need in one sleek 4L system, backed by a 1-year warranty and 24/7 customer support—join the community of savvy aquarists who won’t settle for less. ## Overview The FZONE 4L Aquarium CO2 Generator System is a professional-grade DIY kit featuring a robust 1.5mm thick SUS304 stainless steel bottle capable of handling pressures up to 1137 PSI. It includes a precision needle valve with an integrated bubble counter and backflow check valve for accurate and safe CO2 dosing. Powered by a 12V DC solenoid compatible with timers, it allows customizable CO2 injection schedules. Designed for 600-800g of raw material input, this system offers durability, safety, and fine control, supported by a one-year warranty and round-the-clock customer service. ## Description Product Description INSTRUCTIONS Mix 600-800 gram citric acid and 600-800 gram sodium bicarbonate inside the bottle Add 900-1200ml tap water to the bottle and cap the bottle with the enclosed regulator quickly While the CO2 gas is produced slowly inside the bottle, adjust the needle valve accordingly. It takes approximately 45 minutes for the bubbles to stabilize after each needle valve adjustment If the solenoid is purchased, remove the bubble counter from the regulator (do NOT unscrew the regulator) and attach the solenoid to it. Connect the power cord to the electrical outlet. As gas is continued to generate inside the bottle, adjust the needle valve to the desired bubble count Q: Is the bottle body strong enough under the pressure? What are the specific parameters? A: Yes. The bottle is completely safe. The bottle has a safety valve built-in. It will open automatically when the inside pressure exceeds the threshold Ideal DIY aquatic co2 system with profesional co2 tubing ,glass diffuser CO2 generator is based on the principle reaction of citric acid and sodium bicarbonate mix with water, high purity of carbon dioxide gas is produced. After fully reaction, the CO2 goes through a pressure regulator, bubble counter and diffuser, provide a stable output pressure and flowrate, supply CO2 for photosynthesis, completely solve the disadvantages of the reactive generator pressure instability. Fzone‘s CO2 generator kits included almost all stuffes needed in auqatic co2 system. 8ft professional PU tubing(NOT normal silica gel material) with fixing suction cups, super clear. glass diffuser with U shape connector. funnel and measuring cup make it easy for you to replace the raw materials Dual gauge regulator together with safety valve, bubble counter Precision needle valve. The CO2 flowrate allowing to go as slow as 1 bubble per 5 seconds with our high precision needle valve. Safety valve, will open automatically when the pressure is higher than the allowed threshold. Bubble Counter, you can read your CO2 flow rate directly on the bubble counter cylinder. Bubble counter with check valve built-in to stop water from back-flowing to CO2 tank. Pressure indicator , indicates when it’s time to refill raw materials. OTS Mini DC 12V Solenoid Valve ●OTS 12V DC mini solenoid valve, safer than AC solenoid. ● Energy-saving - low power consumption: 0.4 watt only. keeps the solenoid cool to the touch during operation. ● Use with a timer, solenoid valve allows for CO2 to be switched on/off at defined times, e.g. to synchronize with the aquarium lighting. ● Red LED on/off indicator - the operation (on / off) of the solenoid valve can be confirmed by the red LED. ● No noise - without buzzing or humming sound. ● High-quality model - OST brand, special structure for long-lasting durability and dependability. Upgraded bottle height and diameter rate, solid material used Bottle height upgraded to 16inch (2inch higher than the 2L generator bottle), avoiding the overflow efficiently before the regulator screw in which is caused by the reactor of the citric acid and sodium bicarbonate. The bottle is made of 1.5mm of SUS304 stainless steel (25% thicker than the regular 1.2mm bottle) and can sustain a pressure of 1137 PSI. Attention Adding excessive raw materials and water is prohibited. It is forbidden to invert the bottle. Stronger acid and alkali raw materials are prohibited. When using this product for the first time, there will be large bubbles in the diffuser, which will gradually disappear within 2-3 days. What is in package 4L SUS304 stainless steel generator bottle OTS mini solenoid 8 ft PU CO2 proof tubing (with suction cups) Regulator Diffuser set (with U connector) Power adapter Funnel and Measuring cup Review: FZone 2.5L CO2 Generator - After carrying out a lot of research I decided this system would be the best bang for bucks system for my 120L system. I've been running the generator for 3 months now and I'm really impressed with it. It was easy to set up and the raw ingredients are cheap and easily purchased from desertcart. The powders are added and then the water is added very slowly with the bottle at a 45 degree angle. pouring it slowly slows down the chemical reaction and stops you wasting gas as you screw the regulator on to the bottle. I was getting 2 weeks of CO2 from one charge and when I added a CO2 reactor that figure went up to almost 4 weeks. 4 weeks of CO2 from 200g of acetic and 260g of Bi Carbonate is in my opinion amazing. The regulator is easy to adjust and the solenoid valve works as it should. The kit itself contains everything you need, except the raw materials and a drop checker. These can be picked up cheaply from desertcart. CO2 has made a big difference to my plants and algae growth is virtually zero now. This kit has been the best piece of kit I have bought for my aquarium in a long time. If you want to add CO2 to your system this is a great straight out of the box solution. Review: Great product at a stunning price. - This is the second FZONE system I have ordered not because the first one was faulty but a second one gives me the of having a pressured system ready to swap immediately the working tank empties. The system is easy to install and use on a daily basis and is easy to clean after each recharge. There is no smell from the unit and appears to be of a high quality that will last. It has been connected to my 250l tank for four months now with no issues. The solenoid is controlled by a PH controller and, with the use of a smart plug switches CO2 injection off at night. This is important as the plants do not use CO2 at night so there is a chance of gassing the fish if it were to run with the lights off. Plant growth is certainly improved and I am now able to grow some stunning specimens of Red Tiger Lilies with some off shoots achieving a height of 18 inches in around a week. The biggest effect is on invitro plants that can double in size in a 24 hour period. ## Technical Specifications | Specification | Value | |---------------|-------| | Brand | FZONE | | Item form | Liquid | | Liquid volume | 5.5 Litres | | Manufacturer | FZONE | | Number of Packs | 1 | | Unit count | 1.0 count | ## Product Details - **Brand:** FZONE - **Liquid volume:** 4 Litres - **Item form:** Liquid - **Manufacturer:** FZONE - **UPC:** 764595876395 ## 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) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Dose this come with a uk plug or dose it come with an adapter to change it to uk plug ?.** A: If you order from amazon.co.uk, it come with UK plug **Q: How tall is this with the solenoid included? I see the bottle is 15inches but not th full height.** A: Total hight with solenoid and bubble counter is 58cm for the 2.5l unit. **Q: Hi long. Will this last o. A 500 litre tank** A: It depends on how much CO2 you are giving. **Q: Can somebody please tell me how and from where can i purchase the ots 12v dc solenoid for this co2 kit. many thanks** A: You can order it from Amazon as well. As a matter of fact I just ordered one to replace the old one that didn't work anymore. ## Customer Reviews ### ⭐⭐⭐⭐⭐ FZone 2.5L CO2 Generator *by M***N on 1 November 2025* After carrying out a lot of research I decided this system would be the best bang for bucks system for my 120L system. I've been running the generator for 3 months now and I'm really impressed with it. It was easy to set up and the raw ingredients are cheap and easily purchased from Amazon. The powders are added and then the water is added very slowly with the bottle at a 45 degree angle. pouring it slowly slows down the chemical reaction and stops you wasting gas as you screw the regulator on to the bottle. I was getting 2 weeks of CO2 from one charge and when I added a CO2 reactor that figure went up to almost 4 weeks. 4 weeks of CO2 from 200g of acetic and 260g of Bi Carbonate is in my opinion amazing. The regulator is easy to adjust and the solenoid valve works as it should. The kit itself contains everything you need, except the raw materials and a drop checker. These can be picked up cheaply from Amazon. CO2 has made a big difference to my plants and algae growth is virtually zero now. This kit has been the best piece of kit I have bought for my aquarium in a long time. If you want to add CO2 to your system this is a great straight out of the box solution. ### ⭐⭐⭐⭐⭐ Great product at a stunning price. *by P***T on 24 October 2025* This is the second FZONE system I have ordered not because the first one was faulty but a second one gives me the of having a pressured system ready to swap immediately the working tank empties. The system is easy to install and use on a daily basis and is easy to clean after each recharge. There is no smell from the unit and appears to be of a high quality that will last. It has been connected to my 250l tank for four months now with no issues. The solenoid is controlled by a PH controller and, with the use of a smart plug switches CO2 injection off at night. This is important as the plants do not use CO2 at night so there is a chance of gassing the fish if it were to run with the lights off. Plant growth is certainly improved and I am now able to grow some stunning specimens of Red Tiger Lilies with some off shoots achieving a height of 18 inches in around a week. The biggest effect is on invitro plants that can double in size in a 24 hour period. ### ⭐⭐⭐⭐ Beware when filling with product. *by A***R on 21 April 2026* Had my system for three years. Be Very careful when refilling cylinder, wash inside and dry if possible. My Bicarb and citric acid solidified and unable to remove the solid block at least 6 inches thick. This must have happened over a few months with out me being aware. The material (500ml to 600ml) was fitting in cylinder with the 900 ml of water and working until the mix started to splutter heavily when filling with water which was not normal for me, otherwise a good product. ## 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.gr/products/292869952-fzone-5-5l-aquarium-co2-generator-system-carbon-dioxide-reactor](https://www.desertcart.gr/products/292869952-fzone-5-5l-aquarium-co2-generator-system-carbon-dioxide-reactor) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-07-29*