--- product_id: 522475150 title: "Fzone 2.5 L Aquarium CO2 System Generator Kit for Aquarium Plants Tanks | Easy-to-Refill, Stable CO₂ Output, Safe Reliable, Complete Kit, Regulator, CO₂ Diffuser, CO₂ Tubing and 12V DC Solenoid" brand: "fzone" price: "$288.08" currency: USD in_stock: true reviews_count: 13 category: "Fzone" url: https://www.desertcart.us/products/522475150-fzone-2-5-l-aquarium-co2-system-generator-kit-aquarium store_origin: US region: United States of America --- # 2.5L SUS304 stainless steel reactor 12V DC solenoid timer control Precision needle valve with bubble counter Fzone 2.5 L Aquarium CO2 System Generator Kit for Aquarium Plants Tanks | Easy-to-Refill, Stable CO₂ Output, Safe Reliable, Complete Kit, Regulator, CO₂ Diffuser, CO₂ Tubing and 12V DC Solenoid **Brand:** fzone **Price:** $288.08 **Availability:** ✅ In Stock ## Summary > 🌿 Elevate your aquarium game with precision CO2 control — because your plants deserve the best! ## Quick Answers - **What is this?** Fzone 2.5 L Aquarium CO2 System Generator Kit for Aquarium Plants Tanks | Easy-to-Refill, Stable CO₂ Output, Safe Reliable, Complete Kit, Regulator, CO₂ Diffuser, CO₂ Tubing and 12V DC Solenoid by fzone - **How much does it cost?** $288.08 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/522475150-fzone-2-5-l-aquarium-co2-system-generator-kit-aquarium) ## 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 - • **Built-in Safety Valve:** Automatic pressure release valve protects your system by opening if pressure exceeds safe limits, giving you peace of mind during long-term use. - • **Precision CO2 Control:** High-accuracy needle valve with integrated bubble counter ensures steady 1 bubble per second dosing, optimizing aquatic plant growth with zero guesswork. - • **Smart Timed CO2 Injection:** 12V DC solenoid with timer lets you schedule CO2 release, syncing perfectly with your tank’s light cycle for maximum photosynthesis efficiency. - • **Trusted Warranty & Support:** Backed by a one-year warranty and responsive customer service, ensuring your investment is protected and your aquatic ecosystem thrives. - • **Robust Stainless Steel Reactor:** Crafted from 1.5mm thick SUS304 steel, 25% thicker than standard, built to withstand up to 1137 PSI for ultimate durability and safety. ## Overview The FZONE 2.5L Aquarium CO2 Generator System is a professional-grade DIY kit featuring a durable SUS304 stainless steel reactor bottle, precision needle valve with bubble counter, and a 12V DC solenoid timer for controlled CO2 injection. Designed for aquatic plant enthusiasts, it offers robust safety features and fine-tuned CO2 delivery to optimize plant growth, backed by a one-year warranty and dedicated customer support. ## Description FZONE 2.5L Aquarium CO2 Generator System Carbon Dioxide Reactor Kit DIY Co2 Kit with Regulator And Needle Valve For Aquatic Tank (with solenoid) : desertcart.co.uk: Sports & Outdoors 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: Fantastic - This is a fantastic purchase if you’re looking to add CO2 to your aquarium. I explored a few different options beforehand, including using a fire extinguisher setup that could be swapped at my local fish shop, as well as refillable canisters, but honestly nothing beats the convenience of being able to generate your own CO2 at home with this system. In some ways, it’s actually more efficient than swapping canisters too. When it’s time to regenerate the CO2, you can simply do it overnight while your CO2 system would normally be off anyway. With refillable canisters, you usually end up needing to swap them during the day, meaning the aquarium can be without CO2 for a period of time. One tip I’d give is to use ice instead of water when setting it up. That slows the reaction down for a few hours, because if you add water straight away the reaction starts immediately and you can lose a bit of CO2 while screwing the canister back together. Using ice really helps with that. Overall though, I’m extremely happy with it. My aquarium plants are thriving and the whole tank looks so much healthier and vibrant since using this system. ## Features - Professional DIY Kit. A complete system in 2.5L 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, 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 citric acid and sodium bicarbonate powders - One-year Warranty：Fzone will offer a one-year warranty, round-the-clock service, and you can reach out to us at any time for any product-related concerns. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0B5R18XDV | | Best Sellers Rank | 79,509 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 27 in CO2 Systems | | Brand | FZONE | | Brand Name | FZONE | | Country Of Origin | China | | Customer Reviews | 4.3 out of 5 stars 995 Reviews | | Global Trade Identification Number | 00689323444083 | | Item Form | Powder | | Item Weight | 2.36 Kilograms | | Item form | Powder | | Item weight | 2.36 Kilograms | | Liquid Volume | 2.5 Litres | | Liquid volume | 2.5 Litres | | Manufacturer | FZONE | | Manufacturer Part Number | 2.5 L | | Model Number | 2.5 L | | Number of Items | 1 | | Number of Packs | 1 | | Pet Type | Fish | | Target Species | Aquatic Plants | | UPC | 689323444083 | | Unit Count | 1.0 count | | Unit count | 1.0 count | ## Product Details - **Brand:** FZONE - **Item form:** Powder - **Item weight:** 2.36 Kilograms - **Liquid volume:** 2.5 Litres - **Number of Packs:** 1 ## Images ![Fzone 2.5 L Aquarium CO2 System Generator Kit for Aquarium Plants Tanks | Easy-to-Refill, Stable CO₂ Output, Safe Reliable, Complete Kit, Regulator, CO₂ Diffuser, CO₂ Tubing and 12V DC Solenoid - 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. ### ⭐⭐⭐⭐⭐ Fantastic *by L***H on 9 May 2026* This is a fantastic purchase if you’re looking to add CO2 to your aquarium. I explored a few different options beforehand, including using a fire extinguisher setup that could be swapped at my local fish shop, as well as refillable canisters, but honestly nothing beats the convenience of being able to generate your own CO2 at home with this system. In some ways, it’s actually more efficient than swapping canisters too. When it’s time to regenerate the CO2, you can simply do it overnight while your CO2 system would normally be off anyway. With refillable canisters, you usually end up needing to swap them during the day, meaning the aquarium can be without CO2 for a period of time. One tip I’d give is to use ice instead of water when setting it up. That slows the reaction down for a few hours, because if you add water straight away the reaction starts immediately and you can lose a bit of CO2 while screwing the canister back together. Using ice really helps with that. Overall though, I’m extremely happy with it. My aquarium plants are thriving and the whole tank looks so much healthier and vibrant since using this system. ### ⭐⭐⭐⭐ Good CO2 system for the money *by P***L on 16 September 2025* This was the first time I have added CO2 to my planted tank ,thought long and hard before deciding to go for Fzone 4lt CO2 reactor also watched a lot of you tube videos about CO2 reactors,some good videos of the unboxing and set up of this set .This came packaged well with everything needed for set up This was quite easy to set up for a beginner, instructions could be better but are ample ,canister looks well and the regulator good, loads of CO2 tubing and suction cups also ubend for attaching to tank if required,diffuser supplied as well, cannot comment on diffuser as bought different one due to some of the comments on other reviews ,it also comes with solenoid for for running a CO2 schedule you need to buy your own smart plug or timer switch for this ,you also have to buy your own ingredients for making CO2 ( baking soda and citric acid ) There also seems to be issues with the amounts of each to be added ,some good videos on YouTube regarding this. I have now had this set up and running for more than one week all is working well pressure is good solenoid is working well ,only running for 7hrs a day on a 168 ltr tank ,running at 2 bps and have not had any problems at all I would recommend this for someone thinking about using CO2 in their planted tank I think this is good value for the money will update this review at a later date regarding how long cannister lasted , PS plants are loving CO2 and growing well . You will need to buy your own CO2 drop checker and fluid and this is safest way to monitor CO2 amount. ## Frequently Bought Together - Fzone 2.5 L Aquarium CO2 Generator System Carbon Dioxide Reactor Kit with Regulator and Needle Valve for Aquarium Plants Tanks - FZONE Aquatic CO2 Glass Drop Checker PH Momitor for Aquarium Plant Fish Tank Test CO2 Kit - Clscea Aquarium CO2 Raw Materials Citric Acid and Baking Soda --- ## 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.us/products/522475150-fzone-2-5-l-aquarium-co2-system-generator-kit-aquarium](https://www.desertcart.us/products/522475150-fzone-2-5-l-aquarium-co2-system-generator-kit-aquarium) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-09-04*