when you have a sealed room you sould exchange the air once a day at the very least.

Well then I guess you don't need the play sand then thought they were roots.
Zandor Reviewed by Zandor on . Plant problems, would apprecaite your input zandor Hi, done a substantial amount of reading and have a problem i'm a bit perplexed with as a few possibilites present themselves. helping a buddy do a first grow in this setup. previously have done outdoor quite well, and indoor twice many years ago (but that was soil). this setup is duped from another friend's very successful setup using same everything down to the clones' mommy. First plants are under 2 x 1000w hortilux's, air cooled hoods, sealed room, ac unit w/ condenser intake and Rating: 5