Since only a small amount of nutrient solution runs over the roots, a great deal of oxygen is supplied to them. Most NFT systems are used for growing lettuce, strawberries, and short-term crops. However, American Hydroponics provides for a system featuring a deep gully. It is suitable for larger fruit-bearing crops. One of the most desirable features of NFT is the need for only a small amount of medium.
Aeroponic systems require virtually no medium.
Instead they use a dark chamber for the root system of the plant. In this chamber the roots are constantly sprayed with a fine mist of nutrient solution. General Hydroponics Aeroflow is an excellent example of a partial aeroponic system. Growth rates for plants can be more rapid than with other forms of hydroponics. However, since there is no medium to act as a buffer, the gardener must be more exact in providing proper pH and nutrients .