Nirvana white widow 1st indoor grow

here is my setup, im using a 400 watt grow light inside about a 3x3x5 tent.i figured the 6 inch cooltube would help lower the tempratures. for ventilation im using a 6 inch inline fan also i have the intake running straight from the aircontioning duct in my room. the first setup i tried didnt workout so well and plus it was in an outdoor shed in the middle of summer. a couple of weeks ago i moved these babies inside and they have completly exloped since. since then the temprature hasnt passed over 80f and obviously one of the benifits of growing inoors is air conditioning. so far for nutrients ive used fox farm grow big, big bloom, and big bud. right now theyre in the first week of flowering. so any suggestion? lemme know guys

i got mine off buysingleseed.com and im pretty sure the breeder was nirvana to be honest they struggled alot at first so i dunno if that was me or bad genetics