I was reading the thread on the DIY carbon air purifier, some of the guys mentioned buying the activated charcoal from Wal-mart.

I went there and found some , but the jars were pretty small. I wanted to buy a bigger jar but they didn't have any . I could have bought more than one jar , but I was thinking of making a few of these , so I figured it would be cheaper to just buy one large jar if I can find one.

does anyone know where else they sell it?
I was thinking of checking canadian tire or home depot, or maybe an aquarium store.