First, the seeds are coated by clay that holds in moisture to nourish the seed and they are planted in the foam block with holes called an oasis. Then, workers set them afloat the pool of water. The technicians always check levels of oxygen and fertilizer that's the key to hydroponic growing. In winter the seedlings will grow slower than the summer due to less light. When the plant is grown up, they separate the seedlings apart. After that, move the seedlings that have strong roots into other zones. After that, it will be floated on the water again. This hydroponic system is relatively safe. It produces plants without the use of pesticides and fungicides for growing because it's all indoors fertilizer can contaminate the environment.