hey i got a 3x3x7 grow tent from htg supply. I got a 400w hps system in it. i got 2 500 cfm inline duct fans and 2 fans on high, yet I cannot get my temps under 100 in their.........i got no idea else what to do, as theirs only 2 vents in it, so i cannt add another vent fan. Ideas please, any help is greatly appreciated. Ive been postponing my next grow cause i dont wanna start it to kill them a week or two into it due to heat probs.