Nutrient Film Technique

Nutrient Film Technique systems, or NFT systems, have plants held on a slightly sloped tray. Nutrient solution pumps up to the highest end of the slanted tray. NFT trays often have channels, which direct nutrient solution to plant roots. A submersible pump sits within the reservoir, located directly beneath the tray. As water trickles down through the tray, plants absorb the nutrients, any remaining nutrient solution empties back into the reservoir through a drain tube at the lowest end of the tray.

Nutrient Film Technique
As you can see, these types of hydroponic systems feature a slanted tray, and are best used as a recirculating system. An air pump and air stone combination is optional, but it does help add oxygen through the reservoir.

Benefits of Nutrient Film Technique systems include scalability, which makes it a favored system among commercial operations, and a fairly easy setup. NFT systems are suitable for a wide variety of plants but are especially good for leafy greens and other plants that have smaller root systems.

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