As mentioned before, a constant air supply is needed to the root zone in any hydroponic system.
This is done by adding air to the nutrient solution using and air pump and air stones or bubblers. (SP)
In a single bucket system or DWC, the bucket becomes the reservoir, so the air stone would be placed right in the bottom of the bucket.
In a RDWC there is a reservoir plus a certain amount left in the bucket where air could be added as well so sometimes there are many air stones in use in a system.
One last short section to deal with odors.
There are only a few reliable ways to deal with crop odors.
The easiest way is to just vent them outside along with you’re hot, humid air.
However, this isn’t always possible in a home grow room situation.
Fortunately, we have a few different products that will help with this situation if it arises 😊