The Best CO2 Controller for Grow Room Reviews & Setup

If you're a cannabis grower, you want to have the finest cannabis plant in your garden with covered in tons of fat buds.

You also want to attain the highest yields in your grow room.

To achieve this, simply have the right levels of CO2 grow room kit!

Any plant that is grown indoors requires stringent conditions to ensure that it grows to give you many buds per plant.

Keep reading if you want to learn:

  • Why you want a CO2 controller in your grow room.
  • The different types of controllers and how much CO2 you need in your garden.
  • And the best CO2 controller for your grow room.

Quick Top 3 co2 Controllers:

*Keep reading for the full grow room controller reviews

Why do I need to control the CO2 levels in my grow house?

Cannabis growing is fast moving from the secret closet growing to high tech farming on a massive scale.

Growing herb in your grow room brings with it Carbon dioxide (CO2) conditions that you have to meet to ensure the best yield from your crop.

So, adding CO2 to your grow room will, you guessed it, give you better yields and stronger, healthier plants.

Carbon dioxide (CO2) is one of the most crucial requirements to the growth of any crop. Insufficient CO2 causes crops to stunt in growth or even die.

When growing cannabis in a grow room, it's importance you control the air in these spaces.

See: Cannabis Ventilation.

The maximum PPM (parts per million) of CO2 sufficient for cannabis growth is 1500ppm and anything above this becomes toxic to your crop.

How a Controller Works

In a grow room, you essentially need to have a CO2 generator that pumps air to your plants and a controller to ensure that the levels of CO2 are just right.

Not too high and not too low.

A CO2 tank is connected to the generator and the controller is then connected to ensure that the amount released to your crop is just right.

How to use a CO2 Controller

Depending on your controller type, all you need to do is fix it and calibrate it if yours is one of the models that require calibration.

After setting it up, your crop will be breathing just what it needs to make you a proud farmer!

What to look for when buying a controller

When purchasing a controller, you need to ensure that you pick the most efficient one and one that's easy to use.

Different controllers have different specs with the more advanced products costing more.

Pick one that is affordable and convenient for you, and make sense for the size of your grow room.

The Best co2 Controller for Grow Room

CO2 Meter RAD-050 CO2 Monitor

Day Night CO2 Monitor and Controller for Greenhouses

This CO2 controller is relatively inexpensive and exceptionally easy to use giving it the title of the best grow room controller.

Its accuracy is unmatched by other controllers of its level.

It has a photo sensor that switches off the CO2 supply when there is darkness because CO2 is only useful to your plants during the day.

The downside of this controller is that it has a one-way relay, which means that you need to have more than one if your space is big.

The space limitation is 1500 square feet.

Anything above this size means that you will need additional controlling equipment.

Titan controls 702618 Atlas 2

Titan Controls Preset Carbon Dioxide (CO2) Monitor & Controller, 120V - Atlas 2

This controller is the easiest for you to use and consumes very little energy.

It just requires plugging in!

It features a steel casing that provides protection for your equipment and ensures a long life.

Just like the CO2 Meter RAD-0501, it also has an in-built photo sensor to help you control the CO2 levels only during the day and saves power at night.

Its only downsides are that it might be a bit expensive and its calibration is limited due to the inbuilt calibrator that makes it difficult to adjust beyond a certain point.

Titan Controls 702608 Atlas 3

Titan Controls Day/Night Carbon Dioxide (CO2) Monitor & Controller w/ Photocell, 120V - Atlas 3

This is the most efficient controller you can get on the market presently.

You just need to connect it to your generator, plug it in, and it does the rest for you.

It comes in a plastic casing that makes it resistant to moisture and dust.

This implies that it's highly protected guaranteeing longer useful for you.

It also calibrates itself such that you do not have to keep readjusting.

The manufacturer has a guaranteed warranty of up to 3 years.

This convenience, however, comes at a cost that might make it unattractive for those operating on a constrained budget.

Just like the Titan 2, you can have difficulties recalibrating due to the built-in feature of self-calibration, which can make it difficult to adjust.


Most of our grow rooms don't need a controller.

After all, most of us just grow in a 4x4 grow tent where hooking up a small homemade CO2 generator running every once in awhile will be enough.

But, if you want to take your plants quality to the next level you need to start monitoring your grow rooms CO2 levels.

And for that, you need the best CO2 Controller for grow rooms. 

Last update on 2018-10-18 / Affiliate links / Images from Amazon Product Advertising API

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