There are two ways that nutrients reach your plants with aeroponic hydroponics.  One configuration used is an ultrasonic fogger, rather than a pump to create the nutrient particle. In the case of using an ultrasonic fogger in the hydroponic grow box, the fogger would actually create a fine micron misty fog rather than a 25 micron water droplet. This is a much finer particle and will look more like a heavy fog or floating mist. With this type of system hundreds of thousands of tiny hairs will actually develop on your plants roots. It seems as if these tiny hairs were there to pick up each and every water droplet that surrounds it. The same as in the pump method, the ultrasonic fogging aeroponic hydroponics system can be controlled with a timer 15 minutes on a 15 minutes off so you have both the wet and dry to keep your roots happy and growing fast.