we will be using sensi grow part A and B and sensi bloom with some big bug for flowering. anything else i can do to improve these babies? also i have my intake coming in at the top of the room. this is my only available intake(ducting). should i hang a circulating fan at the top of the room to blow that fresh air down . is there any way that the good air coming in is being blown out the exhaust fan and bad air is just circulating at the bottom of the room?