anyone using the ODOR-SOK carbon filters?

[ChaosCatalunya]

Phat [carbon drum] filters get rated above all others in the UK, the sock is not that much use, but can be put on the other end of your ducting to "double filter" .... Cheese growers use this as even a Phat filter cannot always bust that smell, one even runs a circulating dump fan in the room with a Phat on it as well.

 

[Old Yeller]

I seem to remember northern farmer talking about using large os's in some of his grows & he said they worked just fine...