can i use any fan

can i use any fan aswell as a carbon filter?

yes i use computer fan but household fan blow good air it all about how much air u need to blow

how do i know how much air i need to blow?

its 80cm x 80cm x 2m 400w hps plants are blue cheese in bio biz soil 7 days old

computer fan and activated carbon filter.. a small one, ebay it up theirs 2 sellers for 100 and 80 $ now its a good price