Adding a GrowBright Pure Flow carbon filter to the indoor garden is the most effective way to eliminate unwanted odors and improve air quality in your environment. GrowBright's Pure Flow technology does not simply mask odors; it eliminates them at the source! GrowBright filters contain only the highest-quality virgin activated carbon available. This professional-grade carbon possesses an ultra-high degree of microporosity, making it ideal for odor removal applications. GrowBright Pure Flow carbon filters also remove unwanted air pollutants, such as: dust, pollen, mold spores, etc., maintaining a clean and safe environment in which plants will thrive. Gain complete control over the air quality in your garden today with a GrowBright Pure Flow carbon filter.