Updated: 17 Feb 2025

diy co2 system for aquariums

Updated: 17 Feb 2025

#1

Best Choice
Ultum Nature Systems Micro CO2 Regulator Kit - CO2 Kit for Nano Freshwater Planted Aquariums, Minimal Aesthetic CO2 System w/Bubble Counter for Disposable CO2 Cartridges - Regulator Kit

9.7

Ultum Nature Systems

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Main highlights

High-Quality Construction: Crafted with durable aluminum alloy and finished in sleek gunmetal, ensuring both longevity and style. Keep the minimal aesthetic without crowding your nano scape display.

Easy installation: To install this kit connect the CO2 cylinder to the micro regulator, attach the solenoid, and link the bubble counter, optionally pair with a timer to achieve precision dosing.

Compact Design: UNS Micro CO2 Kit offers a space-saving solution for nano tanks, combining a CO2 regulator with valve, solenoid, and bubble counter into a single, convenient package.
#2

Value for Money
Clscea Aquarium CO2 Generator Kit Double Pressurization Enhanced Version Max for 400g+400g Raw Materials, G700S

9.5

Clscea

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Why we love it

Durable stainless steel construction ensures longevity.

Easy setup with quick plug design.

Excellent customer service and support.

Main highlights

Small Body Big Power
Thickened 1.5mm SUS304 stainless steel cylinder equals 4L, with triple stainless steel filter element for durability and minimized solenoid valve failure.

Ideal for Aquariums
Best for aquariums needing CO2 supplementation, enhancing plant growth and color, and suitable for both beginners and experienced aquarists.

Customer Praises Easy Setup
Customers appreciate the simple setup with clear instructions, effective CO2 output, and noticeable improvement in plant health and growth.
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#3
Fzone 2.5 L Aquarium CO2 Generator System Carbon Dioxide Reactor Kit with Regulator and Needle Valve for Aquarium Plants Tanks

9.3

FZONE

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Why we love it

Durable stainless steel construction.

Perfect for aquarium enthusiasts.

Easy to assemble and use.

Main highlights

Durable Stainless Steel Construction
Fzone CO2 kit features a 1.5mm thick SUS304 stainless steel bottle, ensuring durability and long-lasting performance.

Ideal for Aquarium Enthusiasts
Perfect for both beginners and advanced aquarium hobbyists seeking an efficient CO2 system for planted tanks.

Easy Setup and Use
Customers praise the ease of assembly and operation, making it accessible for users of all experience levels.
#4
Clscea 1.3 L Aquarium CO2 System Generator with Regulator Solenoid Valve for Aquarium Plants (G600SMini)

9.2

Clscea

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Main highlights

【mini Body】Designed for small tank. Does not take up too much space! Quick plug design, makes the filling of ingredients SO convenient!

【SUS 304 Stainlees Steel Material 】The Cylinder, Filter Element and the Neddle valve., etc are all using real SUS 304, Durable and long lasting.

【Accessories】Acrylic co2 diffuser(the disk can be replaced and the refining effect is much better than glass one); Check valve(prevent thetank water backflow)
#5
FZONE Desktop Aquarium CO2 System, CO2 Regulator with 45g Disposable CO2 Cartridge, Compatible with 5/8" and 3/8" Threaded Interfaces, Perfect for Nano Aquariums

8.9

FZONE

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Main highlights

Long-Lasting High-Density：Liquid CO2’s higher density enables a compact design with extended usage. Through internal testing, we found that each bubble consumes only 0.03 ml of CO2. The mini CO2 regulator kit equipped with a 45g cartridge, can last up to 50 days at 1 BPS, on an 8-hour daily schedule.

Compatible with 5/8" and 3/8" CO2 Cartridges Threads: This CO2 regulator aquarium fits standard 5/8" threaded cylinders and comes with a 3/8" adapter, providing perfect compatibility with different cylinder sizes. No need to purchase additional converters or adapters, making it easy to use while saving you time and money.

Compact and Portable CO2 System: For small or desktop aquariums, standard large CO2 tanks can be bulky and impractical. This portable mini CO2 regulator is just 9.84 inches tall and 1.96 inches wide, making it a perfect fit for small spaces. Its slim design is easy to hold with one hand, offering both convenience and ease of use.
#6
FZONE Aquarium Co2 Regulator DC Solenoid with Bubble Counter and Check Valve Plant Grow DIY CO2 System CGA320 Side Open Cylinder

8.7

FZONE

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Why we love it

Easy to read dual gauge.

High precision CO2 regulation.

Exceptional customer service.

Main highlights

Easy to Read Dual Gauge
1.6-inch dual gauge displays cylinder and working pressure clearly.

Ideal for Aquarium Use
Perfect for maintaining CO2 levels in aquariums for plant growth.

Praised Customer Support
Customers appreciate the responsive and helpful customer service team.
#7
BAOSHISHAN 2L Aquarium Co2 System, Upgraded External Threaded Co2 Generator Anti-Leakage, Double Switch Solenoid Valve, Co2 Kit for Aquarium Plants

8.6

BAOSHISHAN

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Main highlights

【Water-Injectable Bubble Counter】Our upgraded bubble counter allows for water addition during normal use, eliminating the need to shut off the gas or dismantle the equipment. In harmony with the fine-tuning valve, it precisely adjusts output while preventing water backflow, ensuring seamless operation and optimal bubble refinement.

【Dual Switch Valve for Added Safety】Introducing a new valve main switch for ultimate control. During reactions, simply close the main valve to solve the problem of gas leakage, minimizing the risk of gas leaks. Plus, with an automatic pressure relief valve that activates when pressure exceeds 35KG, you're guaranteed peace of mind and enhanced safety for aquarium plants.

【 Upgraded External Thread Design】Unlike internal threads, our aquarium CO2 generator accommodates more raw materials without residue, preventing clogging caused by gas escaping during reactions. This innovative design ensures smooth operation and easy access, making maintenance a breeze.
#8
ZRDR Co2 Generator System 2L with Pressure Gauge Automatic Pressure Relief Valve Bubble Counter for Aquarium Plants，Stable Output Sent Steel Bottle Base

8.3

ZRDR

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Why we love it

Durable 304 stainless steel construction ensures longevity.

Automatic pressure relief valve enhances safety.

Economical with low-cost, easily available ingredients.

Main highlights

Durability and Safety
Made of 304 stainless steel, the CO2 generator is durable, stable, safe, and high-pressure resistant, offering a robust alternative to plastic bottle generators.

Ideal for Heavily Planted Tanks
Perfect for large, heavily planted aquariums, especially those with shrimps. Maintains vitality by refining CO2 bubbles for better absorption by plants.

Cost-Effective CO2 Solution
Customers appreciate the low cost of operation, as the system only requires citric acid, baking soda, and water, which are inexpensive and easily available.
#9
YUHOME Aquarium DIY CO2 Generator System Kit CO2 Generator System with Solenoid Valve Bubble Diffuser Carbon Dioxide Reactor Kit for Plants Aquarium, Silver

8.2

YUHOME
#10
ZRDR Aquarium Co2 System 2L with Pressure Gauge Automatic Pressure Relief Valve Bubble Counter for Aquarium Plants，Stable Output

8.0

ZRDR

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Main highlights

Refine The Bubbles: Our CO2 aquarium kit is equipped with an atomizer, which can purify bubbles, make them easily soluble in water and absorbed by plants, and make your aquarium full of vitality. We also gave you an extra atomizer as a replacement to extend the service life of the product. When using this product for the first time, there will be large bubbles in the refiner, which will gradually disappear within 3 days

New upgrade bubble counter: As the water of the co2 generator system bubble counter evaporates quickly, In view of this, we have carried out a new upgrade to the bubbler. The bubble gauge is equipped with a syringe, which can be directly used to inject water (there is a one-way valve inside the generator, only into the water without leakage). And you can also add water during use, no need to close the air outlet, no need to remove the air tube, convenient for your use

High Security: Automatic pressure relief valve, when the pressure of the inside co2 steel bottle exceeds 30KG will automatically release pressure. 12V Waterproof solenoid valve， Keep away from the danger of water leakage from the solenoid valve, protect your safety

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diy co2 system for aquariums

Ultum Nature Systems Micro CO2 Regulator Kit - CO2 Kit for Nano Freshwater Planted Aquariums, Minimal Aesthetic CO2 System w/Bubble Counter for Disposable CO2 Cartridges - Regulator Kit

9.7

Main highlights

Clscea Aquarium CO2 Generator Kit Double Pressurization Enhanced Version Max for 400g+400g Raw Materials, G700S

9.5

Why we love it

Main highlights

Fzone 2.5 L Aquarium CO2 Generator System Carbon Dioxide Reactor Kit with Regulator and Needle Valve for Aquarium Plants Tanks

9.3

Why we love it

Main highlights

Clscea 1.3 L Aquarium CO2 System Generator with Regulator Solenoid Valve for Aquarium Plants (G600SMini)

9.2

Main highlights

FZONE Desktop Aquarium CO2 System, CO2 Regulator with 45g Disposable CO2 Cartridge, Compatible with 5/8" and 3/8" Threaded Interfaces, Perfect for Nano Aquariums

8.9

Main highlights

FZONE Aquarium Co2 Regulator DC Solenoid with Bubble Counter and Check Valve Plant Grow DIY CO2 System CGA320 Side Open Cylinder

8.7

Why we love it

Main highlights

BAOSHISHAN 2L Aquarium Co2 System, Upgraded External Threaded Co2 Generator Anti-Leakage, Double Switch Solenoid Valve, Co2 Kit for Aquarium Plants

8.6

Main highlights

ZRDR Co2 Generator System 2L with Pressure Gauge Automatic Pressure Relief Valve Bubble Counter for Aquarium Plants，Stable Output Sent Steel Bottle Base

8.3

Why we love it

Main highlights

YUHOME Aquarium DIY CO2 Generator System Kit CO2 Generator System with Solenoid Valve Bubble Diffuser Carbon Dioxide Reactor Kit for Plants Aquarium, Silver

8.2

ZRDR Aquarium Co2 System 2L with Pressure Gauge Automatic Pressure Relief Valve Bubble Counter for Aquarium Plants，Stable Output

8.0

Main highlights

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