Top Rated CO2 Regulators and Accessories For Growing Weed 2019

Best CO2 Regulators For Growing Weed 2019

When it comes to growing high quality marijuana, you are going to need a CO2 generating system. This is especially important for people who have larger growing spaces. You may think you can get away with things like fermentation, dry ice or mushroom boxes, but they simply won’t be anywhere near as effective.

The CO2 levels nowadays are pretty high. There at approximately 400 parts per million. This number can go up or down by 10 parts per million depending on the climate and the time of year. It shows us that climate change is real, and it’s happening now.

Growing weed can cause the amount of carbon dioxide in the air to increase to 1500 parts per million. By adding CO2 to the air of your growing space, you help you cannabis to grow better than before and you can potentially have 30% more buds during the harvest. However, be cautious not to add too much CO2 because it can cause your weed to die through suffocation. These are great additions to complete grow tent kits, as most kits to do not come with CO2 systems. 

A crucial tip before you decide to add CO2 into the air of your grow space is to install ventilation systems. This helps the air to circulate better and gives you the best chances of achieving a high quality grow.

Important Information About Regulators & Controllers

There are a couple of different ways you can approach installing a CO2 generator. You can either buy one that has everything you need and is ready to use straight away or you can opt to purchase the parts separately and create your own CO2 generators. If you choose to make your own setup, you need to ensure you have the means to control the amount of CO2 you release into the grow room as well as a source where the carbon dioxide is coming from.

In some cases, the ready-to-go systems can release CO2 by burning propane or butane. Those who want to avoid creating added heat into the grow space would need to use a carbon dioxide tank along with a regulator and controller. The regulator gives you the ability to control how much CO2 is being released from the tank. The controller gives you information about how much parts per million of carbon dioxide is in the air.

What’s A Safe Amount Of Carbon Dioxide To Be Using?

Your safest option when dealing with the amount of CO2 being released into the environment is to purchase a controller. It picks up on the amount of CO2 in your grow space. If you have a regulator and a tank, you still never really know how much or how little CO2 you’re putting out into your grow space. However, if you don’t have the means to a controller, there are a number of ways for you to get an estimate.

If you have a generator, check the rating of cubic feet per hour (CFH). Ensure that you take accurate measurements of your grow tent to provide you with the cubic volume. The equation you would use for this is length x width x height.

Furthermore, if you are using a tank of CO2, the flow rate can be set to be the same. Despite the fact that it is still wiser to be using a controller as well as a timer, you have a small advantage with this method. The plants in your grow space only use up carbon dioxide during the day. So you don’t have to set any CO2 to be released from the tank at night.

You also know that 8.7 cubic feet of gas after it’s released into the environment is equal to a pound of CO2 in your tank. Find out the size of your growing space and multiply it by .0015, or .0013 to be on the side of caution. This provides you with the details on how much flow is required. You can then set your regulator to a more accurate PSI and flow rate. You should also ensure you set your time to release the CO2 at a time that suits you the best.

Here’s an example to follow:

  •         You have a room that 512ft (8 x 8 x 8)
  •         Multiply 512 by .0013 to get 0.66 cubic feet

This number gives you vital information on how to set your regulator. In this example, you would set it for 100 PSI and a flow of 0.33 cubic feet per minute. Simply let this quantity of gas release into your grow space for 2 minutes. Let this same amount of flow of CO2 out into your growing environment every two hours. Do it while your grow lights are on for the best results!

The timer is an essential piece of kit to have because inhaling too much CO2 is unhealthy. When you release the gas into your growing space, it’s best if you’re not in there while it’s happening. It’s actually much more economical using this method as you don’t need to let the gas flow from the CO2 tanks for extended periods of time. You simply do it for 2 minutes, every couple of hours, and that’s it.

We’re about to take you through the top 4 CO2 regulators available to ensure you purchase the best one for your growing needs.

The Top 4 CO2 Regulators

GRO1 CO2 Grow Room Environment Regulator Flow Meter Solenoid

CO2 Grow Room Environment Regulator

This particular CO2 regulator is a great one for those who are growing their cannabis in aquariums. Alternatively however, it is also a fantastic option for people who use growing pots. You can adjust the flow meter anywhere from 0.5 all the way up to 15 cubic feet per hour. There is a solenoid valve that is built to last as well as a pre-set regulator. When you purchase this item there’s a factory warranty included.

SPL Co2 Regulator Emitter System

SPL Co2 Regulator Emitter System with Solenoid Valve

The SPL CO2 regulator is made completely out of brass. This ensures that you are given a regulator that is as accurate and durable as possible. This brand also know that their product is great for growing marijuana as they state it themselves! This package includes a flow gauge that allows you release between 0.5 and 15 cubic feet per hour. The PSI rating is a maximum of 4000.

There is also a power cord that is 6 foot long. It must however be connected to an electricity port of 110V. It can even attach right into a CO2 tank that weights between 20 and 50 pounds through a 10 foot long piece of air hose that’s ¼ inch thick.

Pro CO2 Hydroponics Regulator Emitter System

Hydroponics (Co2) Regulator Emitter System

This CO2 regulator by Pro is made to precise, that’s why it is made out of brass. It has been designed to control the amount of carbon dioxide that you release into the air for growing. You are provides with an air hose that’s 10 foot long as well as a power cord that fits into 110V outlets. It gives you the ability to release a minimum of 0.5 and a maximum of 15 CFH of gas. It can also take up to 4000 PSI.

VIVOSUN Hydroponics CO2 Regulator Emitter System

VIVOSUN Hydroponics CO2 Regulator Emitter System

This product essentially provides you with a lot of the things you have read above with the other products.

  •         You get up to 4000 PSI
  •         Able to release 0.5 – 15 CFH
  •         Requires power outlets of 110V electricity

You do get a 4 year warranty which is good for customers who want a peace of mind.

The Best Controller To Monitor Your CO2 Levels

CO2Meter RAD-0501 Day Night CO2 Monitor and Controller        

CO2Meter RAD-0501 Day Night CO2 Monitor and Controller

The CO2Meter Rad-0501 monitor allows you to know exactly how much gas is being released into your growing space. Is pretty simple to set up. All you need to do is install it somewhere inside your grow room and plug it into an electricity outlet and your regulator. This piece of equipment is great because it also has a built in light sensor. This means the flow will be switched off automatically when it gets dark (since your weed doesn’t use the gas at night, it would just be a waste of CO2!).

You are given precise control over how much you want to adjust the PPM in the grow room. You can go up by 50 PPM at a time starting at 100 all the way up to 9950.

Liquid Propane LP – Autopilot APCG8LP

CO2 Generator - Liquid Propane

For those who don’t want to create their own CO2 generator setup, the liquid propane LP Autopilot APCG8LP would be the perfect solution.

This piece of kit burns either natural gas or propane to add a flow of CO2 into the environment. It is completely cased in steel and is suited for people who have growing space that are larger than 14 x 14 feet. However, you need to be careful with this ready-to-go generator because it can increase the temperature of the room up by 10 degrees while it’s on.

Therefore, we highly recommend that you use a controller with this CO2 generator. It will give you the chance to make sure it is only running when you need it to be. It can create 22 cubic feet per hour of gas.

But the makers behind this product has also installed some fantastic safety precautions. For example, if this equipment falls over, it will be automatically turned off.

Other Accessories When You Purchase Your Regulator

People who are not burning natural gas to create CO2 will need to have carbon dioxide canisters. They can be very heavy, but luckily you can have these canisters delivered straight to your address!

Cyl-Tec 20 lb CO2 Tank – New Aluminum Cylinder with CGA320 Valve

20 lb CO2 Tank

This CO2 tank weighs 20 pounds and it can even carbonate drinks for you! When using this cylinder of CO2, it keeps the PSI gas levels at 1800 PSI.

It has a handle attached to make for easy transportation and has been made with a CGA 320 CO2 valve made out of brass. There is also the option to use a regulator with this gas tank as there’s a valve that has a male thread available for use.

AcuRite 00613 Indoor Humidity Monitor


AcuRite 00613 Indoor Humidity Monitor

Knowing the humidity levels and temperature inside your growing space is essential for achieving high quality grows. The AcuRite 00613 Indoor Humidity Monitor operates on batteries and can be used wirelessly.

Amflo 24-25E-RET Blue

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

This Air hose is ¼” x 25’ large and comes with ¼” MNPT swivel ends. There are also bend restrictor fittings. It can take up to 120 PSI and is made out of polyurethane recoil material. The coil aspect to this item ensures that it can be packed away.

Exhale 365 – Self Activated Co2 Bag Home-grown


This is a great product for newer growers who are more likely to have smaller growing spaces. If your growing space is within 4 x 4 feet large, you would not have to use this product to get CO2 into the air. Hang this bag slightly higher than your plants – It can last for up to 6 months!


Many growers use carbon dioxide to create larger cannabis harvests. It’s also not something that’s too complicated to setup. If you want to build your very own regulator with the products we have listed earlier on (including a tank, regulator, and controller) it’s actually easier than you may think.

Keep up to date with us to find out about the best products that you could be using to improve the growth of your cannabis.

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