Need to buy carbon for my DIY carbon scrubber

i built my own carbon scrubber and i need some advice on buying carbon. I plan to buy in bulk, a few lbs on ebay. Im a bit confused though, as to which particle size i should use. And more importantly, should i buy lignite or bituminous carbon and whats the difference between the 2?

Come on im sure somebody has been in the same situation.

im not sure about the sizes, if i remember correct you dont want it larger than 8mm diameter and not smaller than 4mm(not sure about this, i guess it depends on the shape of the filter too). there are different types besides the size. you wanto look for type ctc 70, the ctc 50 is the cheap stuff that most of the cheapo filters use, ctc70 lasts longer and works better

lignite or bituminous carbon? both of these are inferior to Anthracite, lignite(brown coal) has average of 30% carbon content vs antharacite 92-98%

Jalamar said:

lignite or bituminous carbon? both of these are inferior to Anthracite, lignite(brown coal) has average of 30% carbon content vs antharacite 92-98%

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ok both of your responses are very helpful, but does anyone have any documentation for this? I only ask because its nice to have more than 1 person say something and some real info behind it before i go buy something. i tried google but couldnt find anything