Nutrifield Coco/perlite4 . 6-8 per light crammed . Lollipop like a beast. Defoliate end of week 2. I am feeding Every day .. 2 gallons a day. It is a mess I wish I didn't sign up for. But because they were so over vegged and beast . The numbers are going to be insane. Sealed environment , no fresh air. 79degrees, 50% humidity. 1500 ppm co2. 5x5.5 spread . Double ended will help. ( I only have a couple I haven't switched whole room to de) .