how can I make a super easy carbon filter?

how can I make a super easy carbon filter?
Please I need to know how to make a easy carbon filter.

Take a 31 gallon rubber made cut two hole in it. One for the air to go in and one for the air to go out. make the hols on opposite sides of the container. Put a wire mesh over the holes fill the box with activated charcoal and your all done. Let ,e know if you have any questions.

That is a lot of charcoal. There is a much cheaper and easier way.

1. You'll need j-cloths, or something similar.
2. A bag of activated charcoal. (You can pick this up at a fish store.)
3. A sewing kit.
4. duct clamps.

(I'm assumeing that your box is sealed and has an intake and exhaust.)

Take the j-cloth, fold it in half and sew two ends shut, leaving one open. Now you have what resembles a pocket.
Fill the pocket with the activated charcoal and then finish sewing it shut.
Make sure that it is packed tightly and there is no empty spots.
Fit it to your ducting and bam, you got a carbon filter for like 5 bucks. Hope that helps mate.

Thanks and will it keep 100% smell out?