Activated Carbon Replacement Plans

Activated carbon is a traditional filter used in air purification. Activated carbon grains have large numbers of pores which are able to trap toxins like volatile organic compounds. This process is called adsorption. Over time, these pores become full of  pollutants. When this happens, the activated carbon can no longer remove toxins from the air and needs to be replaced. 

To keep your air the freshest, replace Tera's activated carbon every one or two months. We offer subscription plans that ship activated carbon to you automatically and serve as a physical reminder to change your filter.

Every Month

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every other month 


Activated carbon plans cost just $7.50 per replacement. Because Tera comes with one filter of activated carbon, your subscription will begin one or two months after purchase.

Need an activated carbon replacement immediately? Email us at