ok me and a friend are setting up a grow box in his attic and I have a few questions 5'x3'x3' -What material should I use to construct the sides of the grow box -Where could i get the cheapest HPS set up, either online or at a store, also how much light should I use What else should I get in addition to this list... -Fans -Ph meter -Temp gauge -Pots, soil -Moisture probe -Duct tubing for carbon scrubber -Ferts, what kind? The attic is shared by the HVAC system so its pretty cool all the time. Any help I could get before I start buying stuff would be most appreciated, Thanks...
I recommend plywood or similar for the walls. Some may say cardboard, personally I would be afraid of it catching fire. Cheap HPS can be had at Home Depot in lower wattages, but you have the space for 250w. Try htgsupply-dot-com online. Sounds like you've got the basics lined up, maybe add some mylar or be sure to paint the inner surfaces flat white. Also a good surge protector. You don't have seeds on your list, I assume that's taken care of! ;-)
you could build the frame out of plywood and fill in the gaps with contractor trash bags if you're on a tight budget.