ok so ive been wanting to start growing for a while, and my mates have told me about grow boxes i was wondering if for a grow box, how big would i need it for maybe 2-3plants also does it produce smell if its in a grow box? would i need to get a carbon filter? thank you oh and im a brand new grower except for 1 plant i started not long ago that my dog knocked over the pot and dumped out the dirt and killed the plant