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Hydroponics is the method of gardening of plants in water. It involves no soil. Plants are grown by placing in a growing medium like water by supplying all the necessary nutrients required for their growth. Plants require plenty of nutrients and energy to reach the deep soil to get water from deep soil where as in hydroponics enough nutrients are provided directly and the growth is 50% faster than the traditional method of growing plants. In addition to that, water loss is very less because the water can be reused. We can control the whole nutrient level of the system which will result in very minimal and cost effective nutrient supply to plants. The system is very stable and the yield is very high. Pest and pathogens can be controlled very easily and it is very easy to harvest. Generally, two types of hydroponics techniques are used: one is solution culture and the other is medium culture. In solution culture, no solid substances are used; instead, three types of solutions techniques like static, continues-flow and aeroponic solution are used. The medium culture involves the usage of solid substances like sand, gravel and rock wool as the medium. Moreover, you can find two types of irrigation techniques like sub-irrigation and top irrigation used in hydroponics for growing plants. Commonly the reservoirs are made up of plastic, but materials like metals, vegetable glass, and concrete are also used to build reservoirs. The static culture is done by growing the plants in nutrient containers like glass or plastic buckets. The aerated or the non-aerated solution is supplied from the reservoir and a float valve is used to maintain the nutrient solution level. The containers are covered with butcher paper, plastic or some other material to prevent the light. A stream of nutrient solution is allowed to circulate near the roots of plans in free flow culture.