Here is a example of a fogger system

The numbers refer to the final picture

1. The NUTRAMIST fogger nebulizes a small amount of the nutrient solution stored in the reservoir that doubles as a stand. There are six speeds to control the flow of fog on the NUTRAMIST so you can fine tune its output to match your garden's consumption rate..
2. The fog is pumped up into the tray where it feeds the waiting roots in what we will call the "air layer." Fog that condenses simply drips back down to the reservoir below where it can be recirculated.
3. A quiet, submmersible pump is timed to gently flood the bottom of the tray every so often to provide larger tap roots with unlimited access to additional nutrient solution.
4. The flood level is easily controlled by the adjustable fittings. Once crops are under way, many growers have reported running the pump continuously during daylight hours at the lowest level, much like an NFT system but with the benefit of the nutrient and Oxygen rich fog to feed the air roots above.
5. The drain tube at the bottom of the tray extends down into the solution to avoid creating the sound of running water, thus keeping your garden completely silent.
6. A reservoir level indicator shows at a glance how much nutrient solution is in the reservoir at any time.