How long to carbon filters last?

About 1.5 yrs for me... effectiveness tapers off as EOL approaches. I heard they can be baked and reactivated but i haven't tried it

My 6" phresh filter has lasted over 2 years and so did the one before it.

With 8 flowering plants and a drying closet in the room with 1 or 2 plants in it on and off.

I read to shake the filter to loosen up the Carbon and it will expose more of the surface area. It is packed completely when it starts to leak smell.
 
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My 6" phresh filter has lasted over 2 years and so did the one before it.

With 8 flowering plants and a drying closet in the room with 1 or 2 plants in it on and off.

I read to shake the filter to listen up the Carbon and it will expose more of the surface area. It is packed completely when it starts to leak smell.


Also if its one of the ones with a reversible flange flipping it periodically helps.
 
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