Ok so I plan to make a grow box using 6 2 x 4's with a 400w hps lamp but my problem is i dont really know how to install the carbon filter, like do i still need the exhaust and inline fan or what? please help...
Which of these woods is better to use for a grow box?
http://www.homedepot.com/Lumber-Composites-Plywood-Sheathing-Subfloor/h_d1/N-5yc1vZbqm7/R-203504320/h_d2/ProductDisplay?catalogId=10053&langId=-1&storeId=10051#.UJ7-mfUrfTo...