The name "Hydroponics" was created from a Latin word which means "Working Water." To most of us, it actually means growing plants without soil by supplying all needed nutrients in the plant's water supply.
Just as much as plants use their roots to search for nutrients in the soil during traditional gardening, the water you are using to grow in hydroponics requires a nutrient rich water solution. The plants are also placed within a pot with a growing medium, which is essentially a replacement of the soil creating an environment your plants can grow in. Special growing mediums provide your plants with a dark environment and an anchor point to stabilize the plant to ensure proper plant growth. Some examples of growing mediums would include Rockwool (mineral wool), Perlite, gravel, or coconut husk.
Depending on the growing medium you use, some are inert, which means they do not have any nutritional value for your plants. This allows the gardener to have complete control over the nutrient levels during the growing process.
Advantages of Hydroponics