An ultrasonic hydroponic fogger is a device that emits water in the form of tiny droplets or a “fog”. It can be used in a hydroponic system, which is a type of garden where plants grow without soil. The fogger disperses a constant mist of water that the plants need to grow. The water droplets are so small that it looks like a fog. The ultrasonic part of the fogger means it vibrates very quickly, like a high-pitched sound, which is why it’s called ultrasonic. The vibration is what helps break up the water into tiny droplets. The fogger helps the plants get the water and nutrients they need to grow healthy and strong.