Plants need water, mineral nutrients and oxygen to thrive. There are six hydroponic systems, based on different ways by which these requirements are fulfilled.Ebb and Flow System: It requires a medium such as perlite to give stability. Water and mineral solutions are time to time pumped into the tray containing plants. Plants absorb the solution and the remaining solution drains back to the reservoir. This method is simple and used in home gardens. Herbs are grown by this method.Nutrient Film Technique (NFT): No medium is required. Plants are kept in wooden channels with a slope. The mineral solution is pumped to the high end of the channel and slope down water is collected and reused. Plants with large roots are grown by this method.Drip Systems: It is similar to ebb and flow but here water goes through smaller tubes and drains on top of plants. By using this method, small plants tend to have less developed root systems. Wick Systems: This is a medium based system where perlite or rockwool is used. Nylon rope is placed at the base of each root which extends to the reservoir. It takes up mineral and water and releases in the medium which makes it available for plants. It is an economical method because no pumps are required.Aeroponics: This is a water-based system similar to NFT and doesn’t require a medium. In the form of mists, the mineral solution is sprayed to the plants This is difficult to set up but is beneficial in the large commercial setting.Deep Water Culture (DWC): In a container, the plant’s root is suspended in oxygenated water containing minerals. An air pump is used. This is an easy method and requires low maintenance.