My $3 Carbon Filter

Hey dude thanks a lot I'm on a low budget stealth grow so this helps a lot

one question: about how long will these last without giving out smells? I got 2
white russian lowryders in a pc case with a 4" exhaust fan
again thanks

How long does this last?

And what other materials could we use instead of scotch brite?

Rep.. youve helped me..

rep...just cause this saved me from buying a 80 one thanks

man this design and site are GREAT!
keep the great info coming!

ive seen directions like these to build carbon filters alot, BUT my problem is buying the carbon! petco, petsmart, walmart, tropical fish stores etc.. all sell Activated carbon for at least $10bucks, i know this isnt much but when you need multiple packs it adds up, so my questions are..

1. where did you get your carbon from?
2. about how many grams or pounds of carbon do you need in a smaller grow op? (say 4x4x7) or if you have a diff size leme know the ratio pls

can you just attach it too a fan? ... cause im cheap and the only thing im using for exhaust is like 4 fans

That is the best, these hydro stores are ripping us worse than rippers, keep it up. Bought two t8 6 bulb fixtures from home depot for half the price if one t5 6 bulber. Actually increased my outdoor starts, had mow money to spend on the other great rippers of our time the seed monsters. Some times with the results I wonder if they don't work for leo....

Killer Write up.

Gold * for the good idea. We need more people with creative minds, like you, on this forum.

Great job genius man

Just a heads up, i found this filter near impossible to mount on ducting that is horizontal to the ground because all the carbon would shift to the bottom. After installing a bend and facing the opening verticle it was easily rubber banded to the ducting since gravity allowed the carbon to spread out rather than lump on the bottom.

WWgrower said:

Thanks for the quick reply! I folded it in half because in your instructions you said fill case half way up with carbon, which I did. If I try to lay or put case up against the vent the carbon falls down to bottom of case and half doesn't filter. I have my vent coming through the floor going 6 feet up in corner of room and 3/4 way up my wall I make a 90 degree angle to pick up heat and smell in grow. Obviously I don't have a grasp on how to mount this to vent. I use a 4" diameter hose. So you put this over the opening and excess of the case is anchored by a dryer hose clamp? Is this how it is supposed to be done. Sorry about being such a pain in the ass! I really want this to work.Thanks

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..you could sew lines across to make it look like 4 squares and that will halp hold it from falling ,or add even more stiching ..but this is a great idea and going to make 1 today!

I read your thread and its a great idea!.........I will have to try.

walmart...and they had scottch bright also

Hell yeah, Meijer right on. I love how they have their lights, air filters, timers, and mason jars all in the same area.

WickedPagan said:

Hell yeah, Meijer right on. I love how they have their lights, air filters, timers, and mason jars all in the same area.

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Do they, thats classic!!

This idea looks absolutely awesome. I don't even have an exhaust fan yet but I know I'm gonna need one when my babies start buddin'

Thanks for the info

panhead said:

No the carbon stays dry at all times as with all carbon filters used to remove odor.

How you attach them depends on what your venting,i simple place these over my inline exhaust fans,then take a large hose clamp like the kind for radiator hoses in a car & tighten the clamp,that will hold it in place,works like a charm.

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I'm thinking I'd make a snake or tube version for door frames and window sills and other possible escapes for air. It would be useful if venting any sort of gaseous substances out of a tube through a window when making special things that require substances that evaporate through tubes. It would seal around the windows in their "cracked open" configuration as well as filter that tube! Could make a jacket of this for the herb-drying tote, both inside and out. I want total deniability at the later stages of the game, when I'm getting my deposit back or wanting to kick back for a time if things feel "hot". Could modify a bong with this teknology, and even wear it as a smoking jacket!!! Oh, and what about sealing the insides of stash boxes and such? After all, if the stash is big enough, it could be a fine time to put away the other teks and look like normal apartment renters do, just dipping into my well-filled, charcoal sealed stashes. Yeah!!! The possibilities are endless!!!

Could i just tape this over a 12cm pc fan used as an exhaust?

Jd21095-no