Advice on which Carbon filter to buy

pretty sure you get a bigger filter than the fan if anything. otherwise the air will blow through too quick to get the filtration that company suggests. slowing the air will increase the contact time with the carbon.. if the speed controller can dial it down to 75% or 50% you could probably use the filter
 
build your own custom scrubber. I built mine for about 125.00 start to finish and is a monster. 180oz of premium activated charcoal, and is almost 3.5'l x 15"w (2" of charcoal) and matted to an 750cfm fan. absolutely NO smell in my grow area.
 
build your own custom scrubber. I built mine for about 125.00 start to finish and is a monster. 180oz of premium activated charcoal, and is almost 3.5'l x 15"w (2" of charcoal) and matted to an 750cfm fan. absolutely NO smell in my grow area.

3.5 feet WOW sounds like a beast lol I only need one big enough for a 4x2x7 Tent with a 400 CFM fan. How did you build it any pics or instructions? I have been thinking of making one.
 
for my application I use 150-160 oz of the charcoal.

heres the link to what I buy
http://www.amazon.com/gp/product/B000YJ2W0I/ref=oh_details_o02_s00_i00?ie=UTF8&psc=1

make sure you thoroughly wash the pellets before using. I put mine in some panty hose (doubled the legs) and rinsed for a bit until all the black water is gone. then let air dry (still in pantyhose) in my veg tent for a day or two.

Since I am in Canada I need to buy off amzon.ca for free shipping which of these would you say I should get? Also they don't say if they are granules or pellets how can I tell?
 
I put it up this morning not a smell anymore worked great, all for less than a bill thanks so much for persuading me to build my own!!! Looks store bought, Amazing!!!!
 
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