How To Add Co2 To Grow Tent (Explained)

Adding CO2 to your grow room or grow tent is a great way to increase the yield of your plant. The addition of carbon dioxide will also help your plants grow faster and produce bigger buds in a shorter time. 

In this article, we will show you several methods for adding Co2 into your grow room or tent.

co2 Enrichment Options for the Grow Room – YouTube
Adding CO2 to a grow tent can enhance plant growth.
Proper CO2 levels and monitoring are important for success.
Various methods are available to add CO2 to a grow tent.
Ventilation and safety considerations are necessary.
Optimizing CO2 levels can lead to increased yields.

Add An Injector

You can use your existing CO2 regulator to inject CO2 into the grow tent, or you could get a separate CO2 regulator. 

This is essentially a gauge with nozzles that allows you to set how much pressure the system should be at and have the ability to control it. 

There are many different sorts of regulators, but they all function essentially in the same way: by turning on and off valves that release more or less oxygen into your grow space based on preset levels.

Using a timer with your CO2 injector is also recommended for convenience’s sake so that you don’t have to remember every day when it needs to be turned on or off. 

You also won’t have any issues if there are power outages since timers will keep things running smoothly even if there’s no electricity running through them!

Proper ventilation is essential for maintaining optimal conditions in a tent. If you’re looking to enhance the airflow in your grow tent, our expert advice on improving tent ventilation can help you create an ideal environment for your plants.

Use A Regulator

Once you have a CO2 generator, it is time to add the regulator. The regulator is used to control the pressure of your grow tent. 

There are several different kinds of regulators available on the market today, but they all serve the same purpose: controlling gas pressure.

A regulator has multiple important functions in a CO2 system and can be considered one of its most important components. 

It ensures that plants get the right amount of oxygen without risking over-pressurizing your grow tent or greenhouse environment. 

This helps ensure that there is no risk of damage caused by over-filling with CO2, which could lead to leaks or an explosion due to excessive pressure buildup within this closed environment (this also means you don’t want any kind of leak because this could cause an explosion).

Add A Burner

If you want to raise the temperature in your grow tent, or release CO2 into the air, there are a few options available. 

You can use a propane or natural gas burner that will heat up your tent and release CO2 into the air.

These burners are meant for indoor use only and should not be left on for long periods of time. 

The important thing to remember is that you need more than one fan to ventilate your grow tent so make sure your exhaust system is working properly before turning on any kind of heater

Looking to modify your tent for better functionality? Learn an easy way to add a stove jack to your tent with our step-by-step guide. Check out our article on adding a stove jack to a tent for a simple solution to meet your specific needs.

Use Dry Ice

The most common way to add CO2 to a grow tent is via dry ice. Dry ice is frozen carbon dioxide, which can be created by compressing gas or cooling it to below -78°C (-109°F). 

It’s used in many applications, such as food preservation and scientific research. You can also buy it from home improvement stores or online; some people even make their own at home!

However, there are some downsides to using dry ice:

  • It’s hard to find
  • It can be expensive
  • It’s dangerous if handled improperly

Add A Generator

If you don’t want to purchase a CO2 generator, you can do it the old fashioned way. You can use a generator to produce CO2. 

The same principle applies here: turn on the generator and let it run for a while before turning off your lights. 

The fan that comes with most generators is noisy, so be sure to wear ear protection while using this method.

Use Compressed Co2 Gas Tanks

Use a regulator with a gauge to control the pressure. The gauge measures tank CO2 levels and allows you to turn the flow on or off.

Use your regulator/gauge set-up in conjunction with an injector that fits into your grow tent’s air supply system (if it has one).

When attaching the CO2 injector nozzle, be sure to use Teflon tape on all joints for best performance.

Anchoring a tent properly is crucial for stability and safety. Discover an easy fix for anchoring your tent with our comprehensive guide. Find out more about anchoring a tent and ensure your grow tent is securely in place.

Add A Yeast Solution

You’re almost ready to add the yeast solution! You will need:

  • two cups of sugar (granulated is preferred)
  • one cup of warm water
  • a glass bowl or jar that can hold about two quarts of liquid

To make the solution, put one cup of warm water in a glass bowl or jar. Add one cup of sugar and stir until it dissolves completely. 

This mixture should be clear at this point, but if it isn’t don’t worry; just give it another minute to dissolve before moving on. This is known as the “starter.”

Use Canned Co2

Canned Co2 is a great way to add co2 to your grow tent and/or room. Canned Co2 can be used safely with any size of grow tent and works well for both large scale and small scale growers alike.

Add A Fire Extinguisher

If you are not ready to buy a CO2 tank, or if you’re just not sure whether you will use the CO2 setup on a regular basis, then consider getting a fire extinguisher and filling it with CO2.

You can find these in any hardware store. Most brands of fire extinguishers come with different size canisters so make sure that when you buy one, it has enough room for your plants’ needs.

Once you’ve found an appropriate sized fire extinguisher, check out this video from [Company] How To Make Your Own DIY CO2 Generator To Increase The Growth Of Your Plants:

Considering adding a greenhouse to your shed? Our garden advice and practical tips will guide you through the process. Explore the benefits and steps involved in adding a greenhouse to a shed to create an ideal indoor gardening space.

Use Water And Sugar

Adding CO2 to your grow tent is a fairly simple process. You’ll need to add water and sugar to a large spray bottle, then spray the walls of the tent at least once per day.

The next step is to fill up your tank with CO2. If you have an empty bottle that was used for soda or wine, pour it into a plastic container (or any other container with an airtight seal). 

If not, use another large mason jar filled halfway with water and topped off with sugar (we use about 3 cups). 

Then just screw on the lid tightly and shake it around until all of the sugar dissolves into solution! This will make sure there are no chunks in your tank when it’s time for planting season!

Add A Venturi Valve Injector To The Cooling System Of Your Grow Tent

The old cooling system in your grow tent was fine when you started out, but it’s time to upgrade. A Venturi injector will help to keep your plants at the perfect temperature.

Venturis are devices that use the Venturi effect (also known as “Bernoulli’s Principle”) to create a vacuum in a liquid or gas by converting pressure energy into kinetic energy, which means that air passes through them faster than it would without them due to their shape and design.

The best part about adding this feature is that it doesn’t require any new equipment just take the old fan over to Home Depot and ask them if they can add some tubing so you can hook up your new venturi injector!

Use Seltzer Water Or Sodas To Release Co2 Into Your Grow Tent.

If you don’t have a soda water maker, you can use an empty bottle of soda to create the same effect. 

Just fill it with room temperature water and shake it until the carbon dioxide is dissolved in the water. Then place your grow tent’s lid over the opening like normal, keeping an eye out for leaks as you do so.

Maintaining the right temperature in a greenhouse is crucial for plant growth. Our easy fix guide provides expert tips on how to adjust the temperature effectively. Learn more about adjusting greenhouse temperature and create an optimal environment for your plants in a grow tent.

Liquid CO2

The most expensive option but also the most efficient, safe, and easy to use. Liquid CO2 can be used in any grow room or tent. 

This method is ideal for a home grower who wants to get the best results from their plants by using a very high concentration of carbon dioxide. This means that you’re getting more bang for your buck if you go this route!

Compressed CO2 Tanks

Compressed CO2 tanks are a popular way to add Co2 to your grow room. These tanks can be used in any size grow room and will last for several years. 

Compressed CO2 tanks are made with high quality materials that make them last for a long time, even if you use them frequently. 

However, it’s important to note that not all compressed CO2 tanks are made with the same quality of materials or assembled well enough to last as long as other options on the market today.

Tank TypeDescription
Aluminum CO2 TanksLightweight and durable tanks, ideal for portable and on-the-go use.
Steel CO2 TanksSturdy and reliable tanks suitable for both commercial and home use.
High-Pressure CO2 TanksTanks designed to withstand higher pressure levels for specific applications.
Paintball CO2 TanksCompact tanks commonly used for paintball markers and small-scale applications.
Beverage CO2 TanksSpecifically designed for carbonating beverages, such as soda or beer.
Welding CO2 TanksHeavy-duty tanks used for welding and other industrial applications.

Dry Ice

Dry ice is frozen carbon dioxide. The freezing temperature of dry ice is -109 degrees Fahrenheit, so it won’t melt until it reaches -112 degrees Fahrenheit. 

Dry ice will not produce any water when it melts, so you don’t have to worry about your plants drowning in a pool of water as soon as they start growing. 

This can be useful if your grow tent has a drain at the bottom, allowing excess water to leave without risking plant death by flooding the entire tent with too much moisture in one go!

Fermented Fruit

Fermented fruit is a great way to add CO2 to your grow room. Fermented fruit releases CO2 as it ferments, which means that you can get the benefits of CO2 without having to buy a tank or pump, and without having to worry about releasing too much into your grow tent.

Making fermented fruit is simple: All you need are some fruits, some water and some time. You can choose any kind of fruit that you like (or want).

 Any type of melon will work great! Just make sure that they’re ripe before cutting them up so they’ll ferment quickly!

Once they’re cut up into small pieces and mixed with water in an airtight container, let them sit at room temperature for 24 hours before transferring them into another container where they will continue fermenting for another two weeks or so until all the sugar has been consumed by yeasts present on peelings attached during preparation process.

Brown Sugar

Brown sugar is a good source of carbon dioxide. This makes it a good choice for the beginner grower who doesn’t have any experience with adding CO2 to your grow tent. 

Brown sugar is also cheap and easy to use, as well as having no strong odor associated with it.

This method is often used by first time growers because it can be difficult to get the correct amounts of yeast that you need in order to raise the levels of CO2 in your tent. 

Brown sugar will give you much more bang for your buck by providing more carbon dioxide per dollar spent, which means you’ll have more money left over for other things such as lights or nutrients if necessary!

Brown Sugar TypeDescription
Light Brown SugarContains around 3.5% molasses with a delicate caramel flavor.
Dark Brown SugarContains around 6.5% molasses with a richer, bolder taste.
Demerara SugarCoarse brown sugar with large crystals and a subtle molasses flavor.
Muscovado SugarUnrefined brown sugar with a strong molasses flavor and moist texture.
Turbinado SugarRaw cane sugar with a light golden color and mild molasses notes.
Coconut SugarDerived from coconut palm sap, it has a caramel-like flavor and lower glycemic index.

Yeast + Water

You’ll need a yeast mixture, which can be made with water and dried yeast or liquid yeast. If you’re using dried, simply add the powder to your desired amount of water in a spray bottle or bucket don’t worry about measuring it exactly. If you’re using liquid, follow the instructions on the package.

Once you’ve got that part down, it’s time to test out your setup by adding CO2 into an empty grow tent (or any room). First turn off all fans and ventilators, then close all windows and open doors so there is no airflow in or out of the room. 

Next turn on your fan(s) at full blast for one minute until they reach maximum speed then shut them off completely this will create an area within your grow tent filled with CO2 ready for testing!

Combustion Method

Propane or natural gas burner: If you’re serious about growing weed, but don’t want to spend a lot of money on your set-up, this is the best option for you. 

It has many benefits and only one disadvantage so it’s definitely worth considering if that’s what you’re looking for. The installation process isn’t too difficult and the results are very good!

Torch lighter: The torch lighter is a device that uses an open flame to ignite materials like tobacco or marijuana. 

This type of lighting source can be used in conjunction with other methods but does not work well on its own because it doesn’t give out enough heat at once to produce CO2 levels needed within your grow tent environment. 

It also uses up oxygen quickly which could cause problems since plants require lots of air circulation around them while they’re being grown indoors.”

Combustion MethodDescription
Open FlameUtilizes an open flame, such as a candle or gas burner, to initiate combustion.
Internal Combustion EngineInvolves the controlled explosion of fuel within a confined space, such as in an automobile engine.
PyrolysisChemical decomposition of organic materials through high heat and limited oxygen.
IncinerationComplete combustion of waste materials at high temperatures to reduce volume and eliminate pollutants.
Catalytic CombustionInvolves the use of catalysts to facilitate the combustion process and lower ignition temperatures.
GasificationConversion of carbonaceous materials into a mixture of gases through high-temperature reactions with a limited oxygen supply.

Alka Seltzer & Water

You can use Alka Seltzer or Alka Seltzer Plus to release CO2 into the air of your grow tent. All you need to do is add one tablet per gallon of water, mix it in and let it sit for 5 minutes before pouring into your grow tent. The CO2 will be released over time (it will dissipate slowly).

Diffusing CO2 into air intake fan of your grow room or grow tent.

You can diffuse CO2 into the air intake fan of your grow room or tent. This method works well when you are using a CO2 generator or tank to supply the gas and have a small space to fill. 

It allows you to control how much carbon dioxide is released and provides an easy way to monitor it. You will need:


Hopefully this guide has given you some ideas on how to add CO2 to your grow tent or grow room. 

From simple solutions like sprays and yeast solutions that can be used as needed, to more complex systems like dry ice machines or generators, there are many ways to get the most out of your growing experience. 

The most important thing is to make sure that whatever method you choose is safe for both yourself and the plants! 

If anything feels too complicated or overwhelming, just remember that there are plenty of experts out there who love helping new growers get started with their own gardens – so don’t be afraid to reach out if need some extra guidance.

Further Reading

How to Add CO2 to Your Grow Tent: Learn the step-by-step process of adding CO2 to your grow tent for enhanced plant growth and increased yields.

The Importance of Adding CO2 to Your Grow Room: Discover why adding CO2 to your grow room is crucial for optimizing photosynthesis and maximizing plant growth.

How to Add CO2 to Your Grow Tent: Find practical tips and techniques to effectively introduce CO2 into your grow tent and boost the overall performance of your plants.

And here’s the FAQs section with H2 and several questions and answers in H3 format:


How does adding CO2 to a grow tent benefit plant growth?

Adding CO2 to a grow tent increases the concentration of this essential gas, which enhances photosynthesis, leading to faster and healthier plant growth.

What are the recommended CO2 levels for a grow tent?

The ideal CO2 levels for a grow tent range between 1200 and 1500 parts per million (ppm) during the vegetative stage and 1000 to 1200 ppm during the flowering stage.

How can I measure the CO2 levels in my grow tent?

You can use a CO2 monitor or a digital CO2 meter to accurately measure the CO2 levels in your grow tent and ensure they remain within the desired range.

Are there any risks associated with adding CO2 to a grow tent?

While CO2 supplementation can be beneficial, it’s crucial to monitor and control the levels carefully. High concentrations of CO2 can be harmful to humans and require proper ventilation for safety.

What are some methods of adding CO2 to a grow tent?

Common methods of adding CO2 to a grow tent include using CO2 generators or burners, compressed CO2 tanks with regulators, or CO2 bags that release a controlled amount of CO2 over time.