Carbon Filter what kind of fan do you use?

Title says it all what kind of carbon filter/fan combo you got what size filter? How big is your garden?

I'm going to be growing 2 at the most lol the space I created is a little smaller than I thought...

4x4x7 tent,4 plants dwc,4inch cap vauleline 171 cfm fan,
phat 4x12 200cfm filter.

Nice I just bought a 4" Cap Vauleline!