---
product_id: 522475150
title: "2.5L Aquarium CO2 Generator System Carbon Dioxide Reactor Kit DIY Co2 Kit with Regulator And Needle Valve For Aquatic Tank (with solenoid)"
brand: "fzone"
price: "¥41211"
currency: JPY
in_stock: true
reviews_count: 13
category: "Fzone"
url: https://www.desertcart.jp/products/522475150-2-5l-aquarium-co2-generator-system-carbon-dioxide-reactor-kit
store_origin: JP
region: Japan
---

# 12V DC solenoid valve with timer control 2.5L SUS304 stainless steel reactor Precision needle valve for 1 bps control 2.5L Aquarium CO2 Generator System Carbon Dioxide Reactor Kit DIY Co2 Kit with Regulator And Needle Valve For Aquatic Tank (with solenoid)

**Brand:** fzone
**Price:** ¥41211
**Availability:** ✅ In Stock

## Summary

> 🌿 Elevate your aquatic garden with precision CO2 power — don’t let your plants miss out!

## Quick Answers

- **What is this?** 2.5L Aquarium CO2 Generator System Carbon Dioxide Reactor Kit DIY Co2 Kit with Regulator And Needle Valve For Aquatic Tank (with solenoid) by fzone
- **How much does it cost?** ¥41211 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/522475150-2-5l-aquarium-co2-generator-system-carbon-dioxide-reactor-kit)

## 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

- • **Pinpoint CO2 Control:** High-precision needle valve enables ultra-fine tuning down to 1 bubble per 5 seconds, optimizing plant photosynthesis.
- • **Smart CO2 Scheduling:** Energy-efficient 12V DC solenoid valve with timer syncs CO2 injection perfectly with your aquarium lighting cycle.
- • **Complete DIY Ecosystem Kit:** Includes regulator, bubble counter with backflow prevention, diffuser, 8ft PU tubing, funnel, and measuring cup for seamless setup.
- • **Industrial-Grade Durability:** 1.5mm thick SUS304 stainless steel bottle withstands up to 1137 PSI pressure for ultimate safety and longevity.
- • **Trusted Performance & Support:** Backed by a 1-year warranty and glowing user reviews praising easy setup, long-lasting CO2 output, and vibrant plant growth.

## Overview

The FZONE 2.5L Aquarium CO2 Generator System is a professional-grade DIY kit featuring a robust SUS304 stainless steel reactor bottle, precision needle valve for fine CO2 flow control, and an energy-saving 12V DC solenoid valve for timed CO2 injection. Designed for planted tanks, it delivers stable, adjustable CO2 output to boost aquatic plant growth while preventing backflow and ensuring safety with a built-in pressure relief valve. The kit includes all essential accessories except raw powders, making it a complete, reliable solution for millennial aquarium enthusiasts seeking vibrant, healthy aquatic ecosystems.

## Description

Product Description INSTRUCTIONS Mix 300-400 gram citric acid and 300-400 gram sodium bicarbonate inside the bottle Add 500-600ml 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 metial) 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 metirals 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 15inch (1inch 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. Fzone Aquarium Co2 Generator Professional and safe! Easy to set up! No mess and very effective! A perfect complement to nano planted tank. 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's in package SUS304 stainless steeL bottle Regulator OTS mini solenoid Diffuser set (with U connector) Power adapter Funnel and Measuring cup 8 ft PU CO2 proof tubing (with suction cups)

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.

## 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 | 36,209 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 12 in CO2 Systems |
| Brand | FZONE |
| Brand Name | FZONE |
| Country Of Origin | China |
| Customer Reviews | 4.2 out of 5 stars 977 Reviews |
| Global Trade Identification Number | 00689323444083 |
| Item Form | Liquid |
| Item Weight | 2.36 Kilograms |
| Item form | Liquid |
| 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 |
| 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:** Liquid
- **Item weight:** 2.36 Kilograms
- **Liquid volume:** 2.5 Litres
- **Manufacturer:** FZONE

## Images

![2.5L Aquarium CO2 Generator System Carbon Dioxide Reactor Kit DIY Co2 Kit with Regulator And Needle Valve For Aquatic Tank (with solenoid) - Image 1](https://m.media-amazon.com/images/I/61WHFAHGpsL.jpg)
![2.5L Aquarium CO2 Generator System Carbon Dioxide Reactor Kit DIY Co2 Kit with Regulator And Needle Valve For Aquatic Tank (with solenoid) - Image 2](https://m.media-amazon.com/images/I/71TF5lGVaoL.jpg)
![2.5L Aquarium CO2 Generator System Carbon Dioxide Reactor Kit DIY Co2 Kit with Regulator And Needle Valve For Aquatic Tank (with solenoid) - Image 3](https://m.media-amazon.com/images/I/71KDBPYM7xL.jpg)
![2.5L Aquarium CO2 Generator System Carbon Dioxide Reactor Kit DIY Co2 Kit with Regulator And Needle Valve For Aquatic Tank (with solenoid) - Image 4](https://m.media-amazon.com/images/I/515EbCrL2HL.jpg)
![2.5L Aquarium CO2 Generator System Carbon Dioxide Reactor Kit DIY Co2 Kit with Regulator And Needle Valve For Aquatic Tank (with solenoid) - Image 5](https://m.media-amazon.com/images/I/71hfxPjVENL.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 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

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-07-10*