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How to Choose the Best Grow Tent Carbon Filter

What makes a carbon filter essential to any grow tent is that they remove strong smells as you as well as removing harmful gases that can build up inside the tent.

Whether you are a first-time grower or you are just changing up your grow system, you have come to the right place to get a basic question answered: how to chooses the best grow tent carbon filter. Read on to find out how.

What is a Carbon Filter?

A carbon filter’s primary function is to remove impurities out of an enclosed environment, such as a grow tent, where it is vital to odor management. When you use a grow tent, you’ll need to use fertilizers, pesticides, and nutrients, all of which may cause a foul smell. The odor may become even stronger inside a grow tent and may even scent the surrounding areas outside the tent, too.

A carbon filter will help eliminate all the compounds which cause bad smells. In addition, it will also help to eliminate diseases in your plants. Using a carbon filter in your ventilation will help to keep airborne pathogens our of your tent which will help promote the health of your plants.

How Does a Carbon Filter Work?

Carbon filters come in two main forms: first, just a simple carbon filter, and, secondly, the more versatile carbon filter fan combo. This fan can also function as a normal fan as well, either inline or exhaust.

These types of filters are often cylindrical and made up of either active carbon or oxygen-treated carbon. Both are equipped with highly porous charcoal which allows air to pass through, trapping odor and contaminates, and essentially allowing only fresh air to escape. This is especially important for those of you who are wanting to grow cannabis or other odorous plants discretely.

What You Should Look For in a Carbon Filter

There are several factors that should be considered when you are looking for a carbon filter for your grow tent. For example, you need to be sure of how large your grow tent is, the quality of the carbon and the filter, how long the filter will last, whether it comes with anything, and whether or not it’s portable.

You want to be sure you get a carbon filter large enough to cover the entire area of your grow tent. Getting one too small or inefficient will not eliminate odors as well. In addition, you also want to be sure to purchase high-quality carbon since not all carbon has the same absorption rate. Although this typically means spending more money, it generally pays off in the end. For example, a more expensive option may last up to two years, whereas a cheaper version may only last one or two months.

You will also want to think about whether the carbon filter you are considering comes with any accessories or extra filters. Some include a replaceable sleeve or pre-filter that may even be washable. In addition to saving you money by being at least partially washable, replaceable fabric sleeves and pre-filters greatly extend your carbon filter’s life as well.  There are sites like Canada Grows Indoors that have articles such as that review and break the top carbon filters.

Lastly, you may want to consider a portable carbon filter. In our experience, they are more compact, easier to use, and run much quieter. Another feature you may want to consider is its ability to be used as an inline or exhaust fan. That’s more like having three fans in one.


We hope we answered your basic questions about how to choose the best grow tent carbon filter. We hope you enjoyed our article and we wish you the best of luck setting up your grow tent!

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