japa2222 said:

Ok so say you were growing in a closet in a box and you had a pair of negative ion generators running in the closet outside the growbox. Then on top of that have a glade airfreshener in at least two of the outlets out in the room the closet is in. How do you think that would work?

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I'd be cautious about using negative ion generators. They carry with them adverse health concerns, for both you and the plants, and shouldn't be ran constantly or too close to them. A much more effective way to handle security concerns with smell is to simply use a carbon filter with an extraction fan, which should be necessary anyways due to the need for fresh air exchange for the plants to grow healthily. If you post the dimensions for your grow space, we can help you figure out what size fan to look for with which rate of extraction.

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Also do you thik that a plant can produce a good yield at a height of like 2'-3'?

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Definitely, if the various factors that contribute to a successful grow are maintained well, such as enough light at the right spectrum, air exchange/temperature/humidity, water, nutrients, proper pot size.