add heaps of circulation, thats what i say!! the more fans the merrier! less chance of budrot, buds can breathe and use the fresh air, i thought about it for along time, thats why i added more fans, the air cant sit stale anywhere, constanly moving around, consistent temperature, this time round, my evap cooler is doing wonders, temps seem to be more consistent cause the cooler circulates the air in my room before it goes into my tent, and de-ionisers, sucking bacteria and moulds out of the air