---
product_id: 513184979
title: "Fzone 2.5 L Aquarium CO2 Generator System Carbon Dioxide Reactor Kit with Regulator and Needle Valve for Aquarium Plants Tanks"
brand: "fzone"
price: "HK$1563"
currency: HKD
in_stock: true
reviews_count: 9
category: "Fzone"
url: https://www.desertcart.hk/products/513184979-fzone-2-5-l-aquarium-co2-generator-system-carbon-dioxide
store_origin: HK
region: Hong Kong
---

# 12V DC solenoid timer control Precision needle valve with bubble counter 1.5mm SUS304 stainless steel, 25% thicker Fzone 2.5 L Aquarium CO2 Generator System Carbon Dioxide Reactor Kit with Regulator and Needle Valve for Aquarium Plants Tanks

**Brand:** fzone
**Price:** HK$1563
**Availability:** ✅ In Stock

## Summary

> 🌿 Elevate your aquarium game with precision CO2 power — because your plants deserve the best!

## Quick Answers

- **What is this?** Fzone 2.5 L Aquarium CO2 Generator System Carbon Dioxide Reactor Kit with Regulator and Needle Valve for Aquarium Plants Tanks by fzone
- **How much does it cost?** HK$1563 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/513184979-fzone-2-5-l-aquarium-co2-generator-system-carbon-dioxide)

## 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

- • **Complete DIY Kit:** Everything you need in one sleek 2.5L system—regulator, needle valve, bubble counter, safety valve, and tubing included for hassle-free setup.
- • **Smart Timer Control:** 12V DC solenoid lets you schedule CO2 injection exactly when your plants need it, optimizing growth and energy use.
- • **Precision CO2 Delivery:** Fine-tune your aquarium’s ecosystem with the high-accuracy needle valve and integrated bubble counter—steady 1 bubble per second guaranteed.
- • **Backflow Protection & Safety:** Built-in check valve prevents water backflow, protecting your investment from corrosion and ensuring long-term reliability.
- • **Built to Last, Built to Perform:** Robust 1.5mm SUS304 stainless steel bottle withstands up to 80kg/cm² pressure for unmatched durability and safety.

## Overview

The Fzone 2.5L Aquarium CO2 Generator System is a professional-grade DIY kit featuring a 25% thicker SUS304 stainless steel bottle capable of withstanding high pressure (up to 80kg/cm²). It includes a precision needle valve with an integrated bubble counter for accurate CO2 dosing, a safety valve, and a 12V DC solenoid timer for controlled injection. Designed for indoor aquatic plant tanks, this system delivers steady CO2 output for up to one month, enhancing plant growth while protecting your equipment from corrosion with backflow prevention.

## Description

desertcart.com : Fzone 2.5 L Aquarium CO2 Generator System Carbon Dioxide Reactor Kit with Regulator and Needle Valve for Aquarium Plants Tanks : Pet Supplies

Review: It's a good tank. - 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.
Review: Perfect little co2 delivery system - I bought this for my small 7g aquarium. Original plan was to keep it without co2 because I was out of spare 5lb cylinders and regulator and I needed something small to tuck away. I have used fermentation co2 when if started in the hobby but it never generates enough pressure to use a decent diffuser. This system is great. It arrived next day. I was able to put it in service same day and it was putting out 50psi which is more than adequate for any diffuser. Assembly was easy. Quality of materials is very good. Came with spare orings, co2 tubing, bubble counter, diffuser and a u-tube. Also had a filter which is very essential to keep the regulator out of any issues form the acidic mix. Most of these systems don’t have a good solenoid to run on a timer but I have used fzone regulator and this solenoid is just as good. The bubble counter is solid with not backflow issues. The needle valve is good enough for my needs. Was able to dial it to little under a bubble per second. Also like the 2 guages to show you cylinder pressure and working pressure, which will allow me to know when it’s time to refill the system. It’s been 4 days and the pressure is holding steady and the plants are definitely enjoying it. Would definitely recommend this system to anyone.

## Features

- Thicker and last longer! Fzone's DIY CO2 bottles last longer and are thicker than average! With a strong interior wall that can hold more raw materials, our bottles are made of 1.5mm thick SUS304 graded stainless steel, 25% thicker than competitors. The Fzone co2 kit aquarium can withstand a max 80kg/cm2 pressure and generates CO2 gas for 1 month at 1bps for 8 hours a day when filled with 300-400g raw materials. Get a longer-lasting and more efficient CO2 solution with Fzone!
- Professional DIY kit -- A complete system in 2.5L size bottle, that includes SUS304 stainless bottle, regulator, precision needle valve, and easily adjustable bubble counter. Safety valve will open automatically when the inside pressure exceeds the safety threshold.
- High precision--Needle valve with bubble counter. 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 purchase the citric acid and sodium bicarbonate powders separately.
- Customer Service Team：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 | B0B5R18XDV |
| ASIN  | B0B5R18XDV |
| Age Range Description | Adult |
| Best Sellers Rank | #35,754 in Pet Supplies ( See Top 100 in Pet Supplies ) #115 in Aquarium Air Pump Accessories |
| Brand Name | FZONE |
| Customer Reviews | 4.3 4.3 out of 5 stars (1,505) |
| Date First Available | January 8, 2023 |
| Date First Available  | January 8, 2023 |
| Directions | Assemble the kit by connecting the regulator, needle valve, and bubble counter to the stainless steel bottle. Fill the bottle with 300-400g of raw materials (citric acid and sodium bicarbonate, not included). Connect the CO2 tubing to the needle valve and place the diffuser in the aquarium. Use the 12V DC solenoid with a timer for controlled CO2 injection. The CO2 generator system can produce CO2 … |
| Item Dimensions LxWxH | 12.99 x 3.94 x 13.78 inches |
| Item Package Dimensions L x W x H | 15.91 x 10.98 x 5.67 inches |
| Item Weight | 2.36 Kilograms |
| Item model number | 2.5 L |
| Item model number  | 2.5 L |
| Manufacturer | FZONE |
| Manufacturer  | FZONE |
| Model Name | 2.5l |
| Product Dimensions  | 12.99 x 3.94 x 13.78 inches; 5.2 Pounds |
| Specific Uses for Product | Indoor |
| Warranty Description | 1 year |

## Product Details

- **Brand:** FZONE
- **Item Weight:** 2.36 Kilograms
- **Liquid Volume:** 2.5 Liters
- **Manufacturer:** FZONE
- **UPC:** 689323444083

## Images

![Fzone 2.5 L Aquarium CO2 Generator System Carbon Dioxide Reactor Kit with Regulator and Needle Valve for Aquarium Plants Tanks - Image 1](https://m.media-amazon.com/images/I/515EbCrL2HL.jpg)
![Fzone 2.5 L Aquarium CO2 Generator System Carbon Dioxide Reactor Kit with Regulator and Needle Valve for Aquarium Plants Tanks - Image 2](https://m.media-amazon.com/images/I/61WHFAHGpsL.jpg)
![Fzone 2.5 L Aquarium CO2 Generator System Carbon Dioxide Reactor Kit with Regulator and Needle Valve for Aquarium Plants Tanks - Image 3](https://m.media-amazon.com/images/I/71KDBPYM7xL.jpg)
![Fzone 2.5 L Aquarium CO2 Generator System Carbon Dioxide Reactor Kit with Regulator and Needle Valve for Aquarium Plants Tanks - Image 4](https://m.media-amazon.com/images/I/71TF5lGVaoL.jpg)
![Fzone 2.5 L Aquarium CO2 Generator System Carbon Dioxide Reactor Kit with Regulator and Needle Valve for Aquarium Plants Tanks - Image 5](https://m.media-amazon.com/images/I/71hfxPjVENL.jpg)

## 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

### ⭐⭐⭐⭐⭐ 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.

### ⭐⭐⭐⭐⭐ Perfect little co2 delivery system
*by R***M on March 1, 2024*

I bought this for my small 7g aquarium. Original plan was to keep it without co2 because I was out of spare 5lb cylinders and regulator and I needed something small to tuck away. I have used fermentation co2 when if started in the hobby but it never generates enough pressure to use a decent diffuser. This system is great. It arrived next day. I was able to put it in service same day and it was putting out 50psi which is more than adequate for any diffuser. Assembly was easy. Quality of materials is very good. Came with spare orings, co2 tubing, bubble counter, diffuser and a u-tube. Also had a filter which is very essential to keep the regulator out of any issues form the acidic mix. Most of these systems don’t have a good solenoid to run on a timer but I have used fzone regulator and this solenoid is just as good. The bubble counter is solid with not backflow issues. The needle valve is good enough for my needs. Was able to dial it to little under a bubble per second. Also like the 2 guages to show you cylinder pressure and working pressure, which will allow me to know when it’s time to refill the system. It’s been 4 days and the pressure is holding steady and the plants are definitely enjoying it. Would definitely recommend this system to anyone.

### ⭐⭐⭐⭐⭐ Works great!
*by M***S on January 20, 2026*

This kit is very easy to use. Has a good seal and I have not had any problems with it. My plants have grown very well using it. If you want a step above fermentation but do not want to deal with pressurized CO2 this is what you need.

## 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 Hong Kong*
*Store origin: HK*
*Last updated: 2026-01-23*