Thank you so much for giving me a valuable information I'm really new to indoor So I just started watch youtube about grow room grow tent and purchased 5 X 5 X 7 with mars 2 700LEd and 2 X 1200led with 4 X 8 X7 tents it will delivered to me next week I will use my whole basement as grow yard with two tent I was looking for inline fan found this
http://www.ebay.com/itm/231178508550 it's 6 inch as you told me and it is cheaper than other one and have controller Do I need a Intake fan and filter for my grow tents? or Do I need to intake air from outside using a inline fan then seperate it to two ducted to veg room and bloom room how do you think? I really don't know what should I do for my grow room and Thank you so much for write me a information. I searched ebay I coudn't find closed ended filter what's the difference between inline filter and closed ended filter? and if I intake air to the tent should I use in take filter also? if you help me on this It would be much appreciated Thank you so much again.