I just seal my room as best I can with poly and tuck tape. No silicone. Yes I use Co2. I use a 8 burner blu-ox with a glow plug and a Co2 senson and controller. I foliar spray right when my lights come on. Not twice a day. I hope that answers your questions.

Quote Originally Posted by grow4fun
Hi Tranoble, nice-looking grow(s). How do you seal your room? Do you mean just applying silicone caulk wherever two walls/edges meet?
Also do you use CO2, and why do you use Growth Excel at lights-on (usually people foliar when the lights are about to go off, so the plants stay wet longer and won't burn from the lights). Did you say you apply it twice a day?

thanx