I have a secret jarden 80 growtent running a 600w hps lamp, 5"TT inline fan sucking hpot air out but struggling to get the temps below 85. would a 6" ruck do a better job??
it wont help me i use massive parobolic(umbrella) hoods , aint no fan air blowing past them, i think if he adds ventalation he will drop 3-5*c plus what you said =)