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NFT(Nutrient Film Technique) is a very efficient growing system. As there is constant nutrient feed, it is possible to maintain ideal, constant root zone temperatures.This greatly aids plant growth due to (potential) optimum uptake of nutrients. In NFT Gro-tanks, plants are placed in rockwool blocks and the roots grow along the planting channel benefiting from superb access to oxygen. Nutrient solution is constantly pumped to the roots, and there's no timer to program.
Make sure you have a look at Nutriculture's NFT Infosheet for a handy summary of the essentials to get the best from growing with the NFT system.
Here's a couple of Nutriculture overview and setup videos of the NFT Gro-Tank system -