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Ask a Grower

Ask-a-Grower #81

What is the best form of odor control?

In the world of odor control you have two options. Carbon Filters and Ozone Generators. We’ll explain both below as well as describe the pros and cons of each.

Carbon Filters utilize one of the best natural odor control materials available, ACTIVATED CARBON!! Activated carbon has many microscopic pores that allow the air to pass through but trap any particles larger than a few microns. 99% of all organic materials that produce an odor will be larger than this size. For the carbon filters to work properly you will want to ensure the air passing through the filter receives at least 0.1 of a second of contact time with the carbon. This is displayed on the side of all CAN filters as the maximum exhaust CFM for the filter.

At San Diego Hydroponics we recommend you use CAN Filters as they employ the use a CKV-4 type of carbon that is specifically designed with controlled grain size and a larger surface area than other carbon. CAN Filters also have a “packed bed” design and use an industrial shaker during the manufacturing process ensuring no settling as well as eliminating the possibility for any preferential channels which would allow the odor to pass through the carbon without the proper contact time. It is also recommended that you pull the air through your CAN Filter as they have an exterior pre-filter which traps the larger particles which could clog up the carbon. Pushing the air through the filter will also be effective but will most likely decrease the life span of your filter.

PROS: High quality natural, effective odor control / Cost effective / Entire unit is recyclable / 2-3 year life span

CONS: Size / Weight / Usually not refillable

Ozone Generators create the gas ozone represented as O3. Oxygen is a diatomic molecule meaning that in it’s natural state it occurs as O2. The O3 molecule is looking to return to it’s natural state of O2 by oxidizing, or giving up it’s extra oxygen atom to anything that can oxidized. Ozone can be used to disinfect and deodorize air as well as water. Ozone has a very short half life, in the order of hours in the air and less in water, and it’s only by product is oxygen.

PROS: Can disinfect air as well as water / Bulbs that produce the ozone are replaceable /

CONS: Ozone in large quantities or extended exposure can have negative effects on people, pets and plants.