Best Co2 Generator in 2022 [Detailed Reviews]

Looking for the best co2 generator but can’t make a decision? We’ve analyzed hundreds of verified customer reviews and completed our top-10 ratings.

1427 Reviews Scanned

SaleRANK No. 1

MagTool 4L Aquarium CO2 Generator System Carbon Dioxide Reactor Kit with Regulator and Needle Valve for 600-800g Raw Material

• 4 Liter Capacity. That is 2x larger than the size of our competitors’ CO2 generator systems. Holds 600g-800g of citric acid and sodium bicarbonate, aka baker soda powders.
• Professional CO2 Kit With All Accessories Needed For A Complete Setup! 4 Liter SUS304 stainless steel bottle / DC mini solenoid / Regulator / Precision needle valve / Bubble counter / CO2 diffuser / CO2-graded tubing / Plastic funnel and measuring cup.
• Safety! The wall of the bottle meets the safety requirement - 1.5mm thick SUS304 stainless steel. It can sustain pressure up to 1137 PSI (80kg/cm2). The built-in safety valve will open automatically when the inside pressure exceeds the safety threshold.
• 12V DC Instead of AC Power. DC solenoid runs on very low voltage and generates almost no heat. The solenoid is warm to touch and is super quiet. No humming noises.
• Attentions: The required powders to generate CO2 gas are NOT included! You will need citric acid and sodium bicarbonate powders.

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RANK No. 2

VEVOR CO2 Burner, 2 Brass Burner CO2 Generator for Plant, Liquid Propane LP Carbon Dioxide Generator, 5588 BTU/Hr, Built-in Electronic Ignition, for Greenhouse Green Tent Hydroponic Room Grow Room

• High Output CO2 Generator: This CO2 burner uses liquid propane as fuel, effectively producing sufficient carbon dioxide output to meet the maximum growing potential of plants. High output: 5588 BTU/hr, which can meet greenhouse and grow room carbon dioxide demand.
• Electronic Ignition Design: Features automatic electronic ignition module, this CO2 generator for plants allows for instant lighting of the burners, eliminating open pilot flames. Plus, the solenoid valve ensures the gas does not leak, providing an operation of both convenience and security.
• Specific Material for Humid Situation: The galvanized powder-coated shell is specially designed for the hydroponic environment, making the CO2 generator burner not easy to rust. In addition, 304 stainless steel plate can withstand high temperatures, and the copper tube is designed for long-lasting durability.
• High Combustion Efficiency: Two brass burners, use liquid propane for a combustion reaction, produces plenty of carbon dioxide at a low cost. In addition, high combustion efficiency burners make clean and efficient CO2 delivery for high yield of plants. Plus, the tip-over warning design gives the CO2 generator an additional layer of security.
• Diverse Application: Used for producing carbon dioxide, this liquid propane CO2 generator enriches carbon dioxide content for vegetable and flower planting in the greenhouse, gives remarkable increases in the yield of plants. Perfect for the greenhouse, green tent, hydroponic area, experimental field, and grow room.

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RANK No. 3

ZRDR CO2 Generator System Carbon Dioxide 2L with Dual Gauge Display Pressure Gauge Automatic Pressure Relief Valve Bubble Counter for Plants Aquarium, Stable Output

• PROFESSIONAL FACTORY - We are a manufacturer specializing in CO2 generator system. Our CO2 generator system is made of 304 stainless steel, far better than simple plastic bottle generator, more durable, stable, safe and high pressure resistant
• SAFE PROTECT - Automatic pressure relief valve, when the pressure of the inside 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
• REFINE THE BUBBLES - OUR CO2 generator system equipped with the atomizer, refine the bubbles and make it easy to dissolve in water and be absorbed by plants, Keep your aquarium full of vitality. When using this product for the first time, there will be large bubbles in the refiner, which will gradually disappear within 3 days
• LOW COST - Generates CO2 on your own: you only need citric acid, baking soda, and water which are available in supermarkets. When the gas in the bottle runs out, you only need to purchase the material again
• COMPLETE ACCESSORIES - steel bottle, Stainless steel pressure reducing valve, Filter, Bubble counter, Solenoid valve, Solenoid valve power supply, Solenoid valve connecting line, Spare sealing ring, Spare atomize piece, 4 snap suckers, Check valve, wrench, Stainless steel U-shaped tube, Stainless steel atomizer, base, air tube (1.5 m), Funnel, Installation instructions in English

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RANK No. 4

Clscea DIY CO2 Generator System Kit with Safety Valve 1 Second Quick Reaction for Aquarium Plants Integrated Design

• The DIY CO2 Kit provides an excellent method of deploying the citric acid / baking soda solution to generate CO2 for plants' growing in the aquarium. Easy to operate and designed for low cost planted tank use.
• Highlight: A quick reaction test tube simplifies the procedure and achieves a fast reaction. 1 SECOND QUICK REACTION, works immediately, almost no waiting.
• Green body using high-quality PC material (bulletproof glass material), injection moulding. Extremely durable, corrosion-resistant, and not easily clogged. The transparent design clearly shows the flow of citric acid. Multifunctional: Two holes in the middle are designed to hang trimming tools for water plants.
• Equipped with a safety valve that automatically relieves pressure when exceeds 4 kg/cm², and it also supports manual adjustment. The magnetic acid absorbing ball makes it more convenient to control acid consumption. Brass micro-adjustment valve, more accurate adjustment, more durable. Detachable design, easy to clean, no longer worried about clogging.
• Our CO2 Generator Kit includes most of the accessories. You only need to prepare yourself: 2 additional carbonated beverage bottles (preferably for 2L), e.g. Coke or Sprite; reaction materials: baking soda and citric acid; check valve and CO2 diffuser.

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SaleRANK No. 5

Titan Controls Ares 4 - Carbon Dioxide (CO2) Generator LP - 10.6 CUFT/HR, 4 Burner, Liquid Propane, White

• CO2 is scientifically proven to improve the performance of plants
• Provide a clean & an efficient way to enrich your grow area with CO2
• Comes with everything you need to get your CO2 system started
• All you need to provide is a gas source
• 1.5 Amps/120 Volts/60 Hz

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RANK No. 6

Inkbird ICC-500T CO2 Controller CO2 Meter Carbon Dioxide Controller for Grow Room and CO2 Generator, with CO2 Sensor for Home Grower (CO2 Controller + S01 Sensor)

• 【Double Outlets】Pls plug CO₂ regulator or generator into WORK1, exhaust fan into WORK2.
• 【Programmable】Controls the CO2(ppm) within the desired range and supports calibration and alarms
• 【Plug-n-play】The CO2 controller will turn on/off the device when reaches the desired CO2(ppm) level.
• 【Digital Display】Both the measured CO2 and the desired CO2 are (ppm)displayed on the CO2 Controller
• 【Reliable】CE&FCC certificated. S01 Sensor is suitable for home growing and HVAC Equipment.

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RANK No. 7

Clscea G700S DIY CO2 Cylinder Generator Set with Solenoid Valve Complete CO2 System Kit for Aquarium Plants, 304 Stainless Steel

• 2.3L capacity and 1.5mm thickened wall cylinder, supporting double reaction materials (400g citric acid + 400g baking soda + 600ml water). Constant pressure output through pressure reducing valve, no need to adjust the needle valve frequently. Handmade at home, easy to replace the raw materials, no need to go to the inflatable station to inflate. Suitable for medium planted tanks less than 90cm/35inch in length.
• Corrosion and high pressure resistant 304 stainless steel cylinder with a pressure load of 180kg/cm² (2560 psi). Safer to use. The CO2 regulator is also made of 304 stainless steel, anti-corrosion. (Other regulators on the market are basically aluminum alloy, which is low cost but easily corroded.) Equipped with a safety valve that automatically relieves the pressure when the pressure exceeds the safety value (ca.70kg/cm²; 996psi).
• The bubble counter is integrated with the solenoid valve and has a built-in check valve. And the solenoid bubble counter is replaceable. The bubble counter with QUICK PLUG CONNECTION can achieve plug and unplug in a second, more convenient and fast to replace the raw materials. 12V DC mini solenoid valve! Waterproof, cool touch, super quiet, no humming noises and energy saving.
• This complete DIY CO2 Kit provides an excellent method of deploying the citric acid / baking soda solution to generate CO2 for plants' growing in the aquarium. This set contains almost all the necessary accessories, only the reaction raw materials need to be prepared by yourself.
• Quality inspection one by one, rather than random inspection! We are serious about quality control and buyer experience! If there are any questions, suggestions or ideas, please feel free to contact us.

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SaleRANK No. 8

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

• 【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)
• 【Optional:12V DC solenoid】Having the solenoid on a timer, you can specify when you want CO2 injection ON and for how long
• 【Attentions】Solenoid NOT included, need order separately. Citric acid and sodium bicarbonate NOT included

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RANK No. 9

VEVOR CO2 Burner, 4 Brass Burner CO2 Generator for Plant, Liquid Propane LP Carbon Dioxide Generator, 11178 BTU/Hr, Built-in Electronic Ignition, for Greenhouse Green Tent Hydroponic Room Grow Room

• High Output CO2 Generator: This CO2 burner uses liquid propane as fuel, effectively producing sufficient carbon dioxide output to meet the maximum growing potential of plants. High output: 11178 BTU/hr, which can meet greenhouse and grow room carbon dioxide demand.
• Electronic Ignition Design: Features automatic electronic ignition module, this CO2 generator for plants allows for instant lighting of the burners, eliminating open pilot flames. Plus, the solenoid valve ensures the gas does not leak, providing an operation of both convenience and security.
• Specific Material for Humid Situation: The galvanized powder-coated shell is specially designed for the hydroponic environment, making the CO2 generator burner not easy to rust. In addition, 304 stainless steel plate can withstand high temperatures, and the copper tube is designed for long-lasting durability.
• High Combustion Efficiency: Four brass burners, use liquid propane for a combustion reaction, produces plenty of carbon dioxide at a low cost. In addition, high combustion efficiency burners make clean and efficient CO2 delivery for high yield of plants. Plus, the tip-over warning design gives the CO2 generator an additional layer of security.
• Diverse Application: Used for producing carbon dioxide, this liquid propane CO2 generator enriches carbon dioxide content for vegetable and flower planting in the greenhouse, gives remarkable increases in the yield of plants. Perfect for the greenhouse, green tent, hydroponic area, experimental field, and grow room.

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RANK No. 10

VEVOR CO2 Burner, 4 Brass Burner CO2 Generator for Plant, Natural Gas NG Carbon Dioxide Generator Burner, 12540 BTU/Hr, Built-in Electronic Ignition, for Greenhouse Green Tent Hydroponic Grow Room

• High Output CO2 Generator: This CO2 burner uses natural gas as fuel, effectively producing sufficient carbon dioxide output to meet the maximum growing potential of plants. High output: 12540 BTU/hr, which can meet greenhouse and grow room carbon dioxide demand.
• Electronic Ignition Design: Features automatic electronic ignition module, this CO2 generator for plants allows for instant lighting of the burners, eliminating open pilot flames. Plus, the solenoid valve ensures the gas does not leak, providing an operation of both convenience and security.
• Specific Material for Humid Situation: The galvanized powder-coated shell is specially designed for the hydroponic environment, making the CO2 generator burner not easy to rust. In addition, 304 stainless steel plate can withstand high temperatures, and the copper tube is designed for long-lasting durability.
• High Combustion Efficiency: Four brass burners, use natural gas for a combustion reaction, produces plenty of carbon dioxide at a low cost. In addition, high combustion efficiency burners make clean and efficient CO2 delivery for high yield of plants. Plus, the tip-over warning design gives the CO2 generator an additional layer of security.
• Diverse Application: Used for producing carbon dioxide, this natural gas CO2 generator enriches carbon dioxide content for vegetable and flower planting in the greenhouse, gives remarkable increases in the yield of plants. Perfect for the greenhouse, green tent, hydroponic area, experimental field, and grow room.

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Buying the Best Co2 Generator — A Quick Guide

If you’re on a hunt for a worthy co2 generator, you may run into some potholes. Is it a reliable product that you want to buy? Is it worth spending money? Are there any better (and cheaper) offers from the rival brands? What should I look for in a co2 generator?

So many tough questions… And it looks like there’s plenty of co2 generator on the market — you barely know which manufacturer to trust! So, to help you avoid frustration, indecision and time-wasting, we offer you a helping hand.

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The good news is that we have already done the hard part of research: hand-picking, analyzing and reviewing the best-rated co2 generator. And now we are excited to share our knowledge with you!

So, this is how we test each co2 generator:

• Brand. It’s important to know who makes your co2 generator. We carefully study the company’s portfolio, history and reputation. We look at other co2 generator brands and compare all of their benefits/drawbacks.
• Perks. Each co2 generator may have unique features and specifications. We do a microscopic co2 generator comparison when it comes to various models. So, our assortment presents a co2 generator for every occasion.
• Reputation. We also investigate and compare co2 generator reviews to be sure that it deserves your attention. And our verification AI-algorithms help us to filter out fake, improper or paid-for reviews.
• Value. We separate weed from chaffs and examine quality co2 generator only. No second-rate stuff on our watch list!
• Price. We understand that you aim to buy a reliable co2 generator at the lowest price possible. There’s no shame in being pragmatic! And our co2 generator ratings include both budget-wise and more premium items.
• Warranty. For how long is a co2 generator going to serve? Does the brand vouch for its quality? We also look for the best warranty among other technical details, so you don’t lose your money.

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And then, using all the product information that we managed to gather, we rate each co2 generator individually. We present you all the pros/cons, characteristics, brand’s reliability, overall user rating from 1 to 5 stars, as well as the best model assortment.

Besides, our co2 generator review database is always updated. We understand how important it is to stay relevant and highlight all pros and cons.

So, we keep the finger on the pulse: we track down new product series, check the new players on the market, watch the fashion and trends, and learn about the consumer’s needs and desires. It all helps to figure out the top co2 generator.

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Our co2 generator buying guide uses only trustworthy and double-checked info. And the extra sources for it include:

• Business review websites.
• Articles and reviews from the topic-related expert media.
• Verified customer reviews from the biggest retailers.
• Info from Q&A platforms.

Finally, we employ AI, Big Data and machine-learning algorithms to assess that monstrous caboodle of info. It helps to filter out unreliable info, fake testimonials, low customer rating irrelevant data, outdated reports and other junk information.

So, our Top 10 co2 generator selection is always a source of reliance. Who makes the best co2 generator? What is the optimal affordable price? For how long will it serve in your arsenal? Which brands should be skipped? We answer all that and even more.

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But no database is perfect. If you happen to notice any errors, misleading info, inadequate ratings, undeserved praise/criticism, incomplete feature list or anything else — leave a comment.

We pay a major attention to the fact-check and look for every way possible to make our co2 generator buying guides better. Follow them to find the best co2 generator and take your shopping to the next level.