what about this plastic covering i hear about?
Be a little more specific...plastic covering??
Conquering odor is not easy but your best foot forward is with a carbon filter, not a homemade version as they don't work, and a fan that doesn't exceed the cfm for the filter.
Scrubbing the air is your best bet. Sealing your environment is good but if you have negative pressure, a passive air intake and active exhaust, sealing your environment, while necessary, becomes less of an issue.
Make sure your fan exhausts the cubic feet of your growing environment and you shouldn't have major issues with odor..
:harvest: