Just finishing my first grow and I feel one of my primary concerns from this round was odor control. I'm using a 6" carbon filter->6" cool tube->6" fan->out. Now I know that order isn't 'the best' because of the negative pressure between the fan and the filter, but I've got it taped up well enough that I'm confident leaks aren't a problem. I originally vented the exhaust to another room, and later I changed it to outside. I was surprised with how much odor still existed after the filtering. The grow isn't huge, it's cabinet with a 2' x 4' floor size that's about 6' tall, built in a closet. There are 3 plants total, standing between 3-4' each. When it was originally exhausted inside to another room, sometimes when you would enter the house you could smell it upstairs (grow is in basement). Now that it's vented outside you can occasionally get a slight odor even with the open environment.
I have elected that before I expand any further (such as to a 4x4 tent) I need to get the odor control issue under control. Is it possible to achieve zero or close to zero odor? I've heard about Ona gel, how well does it work? I've also though about increasing the number of filters. Possibly add a filter->fan->filter setup somewhere in the room to constantly filter the air?
I have elected that before I expand any further (such as to a 4x4 tent) I need to get the odor control issue under control. Is it possible to achieve zero or close to zero odor? I've heard about Ona gel, how well does it work? I've also though about increasing the number of filters. Possibly add a filter->fan->filter setup somewhere in the room to constantly filter the air?