Air quality is the most common challenge when growing plants indoors. Soil moisture, fertilizer and organic matter decomposition can create noticeable odors. An active carbon filter addresses this at the source.
How active carbon works
Active carbon works through adsorption: odor molecules physically bind to the porous surface of the carbon. This is not a chemical reaction — gas molecules are trapped in the pores.
The dual-stage system used in GrowlyBox works as follows: 1. Mechanical filter: Captures large particles (soil dust, plant material). 2. Active carbon layer: Adsorbs VOCs and organic odors.
When to replace
With standard use, an active carbon filter remains effective for 4–6 months. The GrowlyBox carbon filter can be replaced easily without disassembling the whole cabinet, thanks to its modular design.
Integration with the fan system
The filter integrates with the twin-fan system that maintains negative pressure inside the cabinet. Fans push air from inside outward through the active carbon. At under 22 dB they can run even at night.