Best CO2 Regulators, Generators & Controllers Reviews 2020

Last updated on February 24th, 2020 at 06:41 am

best co2 regulatorsWe have come up with a brand-new detailed post on “Best CO2 Regulators for Growing Marijuana 2020”.

If commonly known among indoor marijuana growers that if you have more Carbon Dioxide available to your plants, then they provide bigger and better buds.

Did you know?

You can increase the size of the buds by 30% if you provide more CO2 to your plants?

If you are looking for a professional way of growing marijuana in bulk, then you should probably have some kind of CO2 setup inside your grow room or grow tent.

There are many ways to increase the amount of Co2 inside the grow room. Some of them use dry ice, fermentation, using mushroom boxes and using Co2 generator machines.

We recommend buying all in one ready to use CO2 generators. With those you don’t have to do anything, the generator will make CO2 and regulate it automatically.

On the other hand, if you have the experience, then you can use a CO2 tank with a regulator attached to it to provide more CO2 to your plants.

So, without boring you with the nerdy talks, let go ahead and show you the overview of the products in our Co2 controller reviews that we have reviewed today.

Best CO2 Controller Reviews  – Regulators & Generators 2020

ModelWeight (lbs)Dimension (inches)Link
Amflo Air Hose 15.8 ounces1/4 X 25 Check Price
PRO CO2 XL Bucket 89 X 8(dia) Check Price
Titan Controls ARES 2 CO2 Generator 19.812.9 X 11.4 X 22 Check Price
Fungivore CO2 Mushroom Bag 29.1 X 6.7 X 6.7 Check Price
ExHale 365 CO2 Grow Bag 4.59.1 X 7.4 X 5.6 Check Price
ExHale 365 XL CO2 Grow Bag 7.9511.1 X 8.9 X 5.9 Check Price
MANATEE CO2 regulator system 2.39.2 X 6.6 X 4.6 Check Price
Autopilot APCG4LP 2223.5 X 18 X 13 Check Price
Autopilot APCG8LP 2223.5 X 18 X 13 Check Price
SPL CO2 regulator 2.759.2 X 7 X 6.2 Check Price
CO2Meter Digital Co2 controller 26.4 X 2.5 X 5 Check Price

Best CO2 Controller Reviews 2020

Let start with the reviews now,


Amflo Air Hose – Neat and Clean airline

Amflo 24-25E-RET Blue 120 PSI Polyurethane Recoil Air Hose

Amflo 24-25E-RET Blue 120 PSI Polyurethane Recoil Air Hose

This is an air hose from Amflo company.

We don’t have to tell you about its uses as you all might already know it.

It is used to transport the CO2 anywhere you like.

You can use it indoors as well as outdoors. It is made out of polyurethane material, and it resists abrasion, kinking, UV radiation, oil, chemicals, heat, weather, and elasticity.

The ends on this air hose are ¼” male NPT to reduce the hose twisting when connecting it. There is a bend restrictor to extend the lifespan of this air hose.

The maximum pressure when working is 120 pounds per inch (PSI).

The temperature range on it is -30 to 150 degree F. the dimensions of this air hose are ¼ X 25 inches, and the weight is only 15.8 ounces.

This is a basic accessory that you will need if you are setting up CO2 setup manually. It has good reviews on the amazon and they also provide 3 year warranty on it.

  • Swivel fittings to reduce hose twist
  • Long lifespan
  • Highly rated on amazon
  • 3 year warranty
  • Excellent even in cold weather
  • None


If you are setting up your own setup with different parts, then this will be a must buy for you.

We have added it here to give you a product which is trusted by many marijuana growers around the world. It cheap, long lasting and does its job.


PRO CO2 XL Bucket – Natural releasing CO2 source

PRO CO2 XL Bucket – Natural releasing CO2 source

You might want a CO2 source which does not use electricity or any other fuel. Then you might like this product a lot.

This CO2 bucket by PROCO2 has good reviews on Amazon and is not costly at all.

These buckets were created to increase the overall plant health as well as the yield of marijuana plants. The bucket will provide much-needed CO2 to your plants, and you will see the bud getting much more significant.

This CO2 bucket is best suited for a growing area of 5 X 5 feet. You can start using it as soon as you get it. You have to remove the top sticker, and it will begin to release CO2 in the air.

With the built-in hooks and handle, it is much easier to carry around the bucket.

You will not need to refill or do any maintenance on this bucket, it can just stay in a corner, and it will keep doing the work.

The total weight of the bucket is 8 pounds, and the dimensions are 9-inch height and 8-inch diameter.

You will get about 5 to 7 months of CO2 from this bucket, after that, this period the product will expire.

  • No electricity needed
  • Will work for 5 to 7 months
  • No maintenance needed
  • Affordable
  • Best for 5 X 5 feet grow area
  • You will not be able to control the amount of CO2 that is generated by this bucket.


This is a very cheap and easy solution for increasing CO2 inside your growing area.

If you are just a beginner and do not have enough knowledge about handling CO2 then this is a good option. It will work automatically once you open the LID sticker.


Titan Controls ARES 2 CO2 Generator – Professional CO2 generated for bulk growers

Titan Controls ARES 2 CO2 Generator

If you are looking for a CO2 generator that can provide you with whatever amount of CO2 you want then this is the best choice.

Titan Controls make some awesome marijuana equipment.

This particular Co2 generator is called ARES 2 and uses Liquid Propane to create CO2. It burns the liquid propane to create and spread CO2 inside the grow area.

We all know how important CO2 is for plants, this CO2 generator will help your marijuana plant to provide better and bigger buds.

This is a 2 burner model. Meaning, there are 2 burners that will burn the liquid propane to create CO2.

The good thing about this company is that they sell this Co2 generator in many different configurations. You can get a 2 burner, 4, 8 and 10 burners model as well.

You can even get liquid propane and natural gas burners as well if you got another fuel source.

Burning liquid propane to create co2 is a very efficient and clean process.

To start using this CO2 generator, all you need is a fuel source. Other than that, everything is included in the package. You won’t be needing anything else at all.

The package includes CO2 generator, AC power supply, hanging chain, regulator, appropriate air hose and ceiling hooks.

This CO2 generator works on AC 1.5 amps, 120 Volts, and 60 Hz power outlet. The capacity of this burner is 5.3 CUFT/Hour.

The overall dimensions and the weight of this package are 12.9 X 11.4 X 22 inches and 19.8 pounds respectively.

If you want help setting this up or want to read the instructions then please GO HERE.

  • Regulator help you control the amount of CO2
  • Comes with everything you need to start (except the fuel source)
  • Clean and efficient CO2 generation
  • High ratings
  • Trusted company
  • Many different models available to suit different styles and needs
  • No warranty information mentioned


This is a decent setup that you could have to improve your harvesting. It has regulators, burners, air hoses and other things that you would need to set the whole things up.

Just find a liquid propane source and you are good to go. We definitely recommend this to people who want to create clean CO2 easily and efficiently.

Fungivore CO2 Mushroom Bag – Automatic Co2 dispenser

Titan Controls ARES 2 CO2 Generator

This is a very cheap alternative for creating CO2 inside your grow room.

These are mycelium derived Carbon dioxide mushroom bags. Generally, the mushroom bags that you get in the market are already making CO2.

But this mushroom bag is made by a company that has customer activation technology. What that does is, it postpones the generation of CO2 until the package is delivered to you.

That is some serious talent these guys have!

You can use this CO2 bag if you have you grow room around the size of 4 X 4 feet. With a cycled exhaust, your plants will benefit a lot by the extra CO2 that this bag makes.

Use this CO2 bag during the Blooming or Flowering period to get the maximum benefit. The bag will keep providing CO2 for about 3 to 4 months.

How to use it?

There is a dense rubber band inside the box which you have to open and then shake the whole box to let the live fungus mix with the medium. Thereby activating the generation of CO2 inside the bag.

The size of this bag is 9.1 X 6.7 X 6.7 inches and it weight about 2 pounds.

  • Cheap
  • Mycelium derived CO2
  • Provides CO2 upon delivery
  • Suited to 4 X 4 grow area
  • Mixed reviews on amazon


Although this is not suitable for a large area with a lot of plants, you can test it out if you are a beginner and have a small growing space.

It is cheap and will provide your plants with CO2 wit fungus and mushrooms. Definitely worth a try if you are just starting out as it does not cost that much!


ExHale 365 CO2 Grow Bag – Homegrown CO2 bags with high ratings


This Exhale CO2 grow bag comes in two different sizes.

You can get a big 6 X 6 size and a smaller 4 X 4 feet size. The product is the same just the growing area is different.

Both the sizes are capable of producing CO2 supply for a minimum of 6 months, the only difference they are going to have is that the XL size is going to generate a larger amount of CO2 than the normal one.

The best thing about this bag is that you don’t have to wait at all, as soon as you open the bag, it will start doing its work.

As simple as that!

This CO2 bag is a harmonious way of providing your plants with the CO2 all day long for many months. You do not need to refill anything or do any kind of maintenance.

With the purchase of either the normal one or the XL package, you will get FREE Thcity gloves.

There isn’t a big price gap so you can buy the one which suits your grow area better.


Do not remove the filter patch. Do not remove the exhale cultivator, by doing so you will damage the CO2 generation.

Normal variant
Dimensions – 9.1 X 7.4 X 5.6 inches
Weight – 4.5 pounds
XL pack
Dimensions – 11.1 X 8.9 X 5.9 inches
Weight – 7.95 pounds

  • No heat generated
  • No electricity needed
  • Works for a minimum of 6 months
  • 2 sizes available
  • Produces 500 ppm CO2 approximately
  • Cheap
  • High ratings on amazon
  • No maintenance
  • No control over the amount and timings of CO2 generation


This CO2 bag is loved by the buyers on Amazon and has received good reviews. It is very cheap so you should definitely try it in your grow room.

It works for 6 months guaranteed and has 2 buying options. If you are testing out effects of CO2 on your plants then this is the product to buy as it will produce CO2 and will not cost you a leg.

Normal size –  Xl size

MANATEE CO2 regulator system – All in one system for CO2 control

Hydroponics (Co2) Regulator Emitter System with Solenoid Valve Accurate

This one of the cheapest packages on the market right now.

For a very cheap price, you get so many free accessories with this: CO2 dispensing line, Grounded power cord, 2 X plastic washers, pressure gauge, free meter, CO2 outlet fitting, 5-meter-long plastic tubing, Solenoid, etc.

If you want to completely control the CO2 amount in your grow room of grows tent then this is the best product for it.

It is made of high-quality materials. The CO2 regulator is made from precision instruments.

The construction material used is brass to provide strength along with a long lifespan.

The industrial solenoid, flow gauge and the regulator give you the highest dependability and precision for controlling CO2.

You can use this regulator both indoors and outdoors as well. It is designed to give you easy control over the amount of CO2 in your growing space.

It can be used in any place; the outlet should have 110 volts which can be found anywhere in the US.

Temperature Control Range: 50 – 115 °F
Relay Operating Life: 100,000 Electrical
Temperature Operating Range: 32 – 120 °F
Main Power Voltage: 110 volts
Humidity Control Range: 20 – 80% with 5% differential
Maximum Amperage: 15 amps
Humidity Operating range: 0 – 99%
0 to 4000 PSI Gauge
10 feet of 1/4″ airline
Co2 RELEASE – ½ and 15 SCFH

The dimensions of the package are 9.2 X 6.6 X 4.6 inches and the weight is 2.3 pounds. The product comes with a 30 day warranty.

  • Cheap
  • Highly rated
  • 30 day guarantee
  • Works with all power outlets
  • High quality materials used
  • Encourages the plants to increase the yield
  • All the things you need are included in package
  • None


This is one of the best all in one package that you could get for your CO2 setup. It releases proper CO2 efficiently and does need a lot of space to operate.

It is cheap, made with good quality materials and will increase the plants yields by 40%. It’s a must buy for you!


Autopilot APCG4LP and APCG8LP CO2 generator – EDITORS CHOICE

Autopilot APCG4LP and APCG8LP CO2 generator

We would love to recommend this to everyone who is looking to increase the amount of CO2 inside their grow room or tent.

These CO2 generators from Autopilot are very trustworthy products. One of them has four burners, and another one has 8, other than that they are identical.

More burners = More CO2

So, if you have a high demand for CO2 or you have a large grow room with many plants then opt for the eight burner generator.

Both of them burn liquid propane to create clean CO2. They both have dual solenoid valves which are made with high-quality materials.

The burners in both the models are made out of brass, which will make your product longer-lasting and dependable.

You will not need any pilot as these models are solid-state electronic ignition modules. You get a five-year warranty by Hydrofarm company as well.

Best feature?

This one is very important if you have liquid propane lying around. What this safety feature does is, if the CO2 generator tips over then it automatically stops the supply of liquid propane to prevent any kind of accident. It even has a two-stage valve which means the fuel will not reach the burner if the pilot is not lit.

The insides of this product are powder coated with steel to resists and prevent things like moisture, discoloration and rust.

This unit is very easy to operate and provides your plants with instant CO2. You can also get a variant that uses natural gas instead of liquid propane.

The components you get are: hanging wire kit, 24V power supply, 12 feet gas hose, brass burners, pressure regulator and dual solenoids.

Four burner model
Dimensions – 23.5 X 18 X 13
Weight – 22 pounds
Capacity – 11 cubic feet per hour
Suitable for – 14 X 14 feet or smaller
8 burner model
Dimensions – 23.5 X 18 X 13
Weight – 22
Capacity – 22 cubic feet per hour
Suitable for – 28 X 28 feet or smaller

  • BTU output ratings
  • Powder-coated steel interior
  • Backed by hydro farm warranty
  • Solid-state electronic ignition
  • Precision manufactured brass burners
  • Warning LED lights
  • Natural gas variants available
  • Shut down safety feature
  • Might be costly for some (but you gotta pay for the best stuff, right?)


This CO2 generator is suitable for anyone who has a few marijuana plants in their grow room. It comes in different sizes and different fuel variants, which give you better flexibility when buying.

If you ask us, then this is the product you should buy because it has everything you would need to get those marijuana buds bigger and better. Go to Amazon now to see the latest price!

4 burner8 burner

SPL CO2 regulator – the Best regulator for the cheap price

SPL Co2 Regulator Emitter System with Solenoid Valve Accurate and Easy to Adjust Flow Meter Made of High Quality Brass

This is easy to use and operate CO2 regulator by SPL. This product has got 4.4 stars on Amazon for its quality and usage.

We would recommend this CO2 regulator to the beginners who don’t want to spend a lot of money trying new things.

The highest pressure this gauge can handle is 4000 psi. The flowmeter has reading 0 to 15 scfh.

The connector on this CO2 regulator is a CGA-320 which is pretty standard in all the CO2 generator setups.

You will need a hose which is 4.2mm in diameter to get it to work perfectly. With that, you also get a 6 feet power cord and a 10 feet 1/4th inch air hose line.

This is a must for increasing the yield of any plants by increasing the amount of CO2 in the air. This CO2 regulator will connect to the 20# or 50# CO2 tank.

The weight of this unit is 2.75 pounds and the dimensions are 9.2 X 7 X 6.2 inches.

  • Cheap
  • High rating
  • Pressure from 0 to 4000 PSI
  • Connects with 20# or 50# CO2 tank
  • Best for beginners
  • Complete control of CO2
  • No warranty


This co2 regulator is really good considering tis cheap price. You get a long power cord and long air hose to get Co2 from the tank to the air.

You should try this one and see how your plants react to increased amounts of CO2 in the air. Do let us know how much did this product help you!


CO2Meter Digital Co2 controller – Best controller for CO2

Day Night CO2 Monitor and Controller for Greenhouse Review

This is a unique product, unlike others, this is a digital product which will make your life way easier.

This device is designed to completely control the amount of CO2 in your grow room. You can follow the guiding Lights on the device which allow CO2 enrichment during daylight hours only.

If you have any other CO2 regulators or setup, then you can even attach them with this device thanks to its piggyback plug.

This is by far the easiest way to control the CO2 levels, use the screen to adjust the amount of CO2 you desire for different timing.

This Digital CO2 controller for greenhouses has got 4.1 stars out of 5 on amazon by more than 100 customers.

It works with 110 volts – 240 volts and 5 amp socket.

Best thing?

Whenever the levels of CO2 have reached the maximum level, this device will auto shut off the CO2 supply for safety reasons.

The controller has inbuilt light sensors which will stop the CO2 supply if you like during dark hours.

Your plants need less CO2 at night, so it’s a waste to keep the regulators on all night. This device saves you money.

It is very easy to install this controller; you just need to mount it inside your grow room and plug all the cables. Plug the CO2 tanks and other regulators and its ready to go!

The size of this device is only 6.4 X 2.5 X 5 inches and it weighs 2 pounds only. You also get a one-year warranty with it.

If you would like to see the detailed specifications, then please go HERE.

  • Non UV emitting LEDs
  • 1 year warranty
  • Large LCD
  • Easiest to use
  • Auto shutoff
  • Easy calibration
  • Photo sensor save money
  • Accurate and precise
  • None


This one is for those who want to make the Co2 regulating fun and easy.

You just got to connect all the plugs and cables and you will never have to adjust it again. Digital controlling is best because it does the job automatically.

Buy it now if you want a relaxing experience.

Also check:


We have tried to gather different kinds of CO2 regulators which have varying prices to give you readers a maximum choice.

Although we have added a few Co2 regulators to this Co2 controller reviews, you might find others on the market as well, but we have done best to get you the top products.

We would recommend everyone to buy the Autopilot APCG4LP and APCG8LP CO2 generator[Editor’s Choice].

Autopilot makes good products and has good ratings in the market as well. When purchasing these CO2 generators, you will get plenty of choices to choose from depending upon the fuel and the growing area.

Don’t forget to check out our other reviews on this website to see other awesome reviews all related to MARIJUANA.

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