Hey everyone this will be my first grow and was hoping to get some input. I have a: -5 Purple Kush auto seeds -24x24x60 in tent -400w MH light kit. and HPS bulb -Fan for circulation I need the inline fan and carbon filter. -Would it be better to buy a combo or make the filter? -For my size 4in fan should be be ok? -Do I need and exhaust/intake fan if I have an inline? Sorry, for the newb questions I have been reading but, am still a bit confused.