Mostly, while describing hydroponic systems one’s focus is on management and monitoring of mineral nutrients in the nutrient solution, what generally goes under mentioned is the role of dissolved Oxygen in the nutrient solution. Oxygenation of root system in hydroponics is of vital importance to check crop stress and root diseases. A warm nutrient solution, generally above 270C holds much less oxygen than a cooler one, as well as fast movement or ponding of nutrient solution in the NFT gullies may result in low availability of dissolved oxygen. Dissolved oxygen (DO) availability can generally be maximized through installing venturi oxygen injector at the pump bypass in the NFT pump room. Commercial NFT hydroponic systems may install a “Nutrient Solution Chiller” in hot climatic conditions to cope with low supply of dissolved oxygen.