Diy Carbon Filter : Activated Carbon Air Filter 4 Steps Instructables - 1 litre of carbon weighs 0.45 kg so if you worked out your filter volume to be say 10 litres you need to buy 4.5 kg of carbon, a 5kg tub is less than £40, although that was a.

Diy Carbon Filter : Activated Carbon Air Filter 4 Steps Instructables - 1 …