In an NFT hydroponic system, the pump should run continuously to maintain a consistent flow of nutrient solution over the roots of the plants. The continuous flow ensures that the plants receive a constant supply of water and nutrients while allowing for proper oxygenation of the roots.
Running the pump continuously helps prevent the roots from drying out and ensures a consistent nutrient delivery. It also aids in maintaining a stable root zone temperature. The continuous flow of nutrient solution in the NFT channels creates a thin film of liquid that flows over the roots, providing them with the necessary moisture and nutrients.
Therefore, it is recommended to run the pump in an NFT system 24 hours a day, seven days a week. This ensures that the plants receive a consistent supply of nutrient solution and promotes healthy growth. However, it’s important to monitor the nutrient solution levels and the overall health of the plants regularly to ensure optimal conditions and make any necessary adjustments.