Expanded clay or lightweight expanded clay aggregate is a lightweight aggregate made by heating clay to around 1,200 °C in a rotary kiln. The heating process causes gases trapped in the clay to expand
Heat-expanded lightweight pebbles
Root ball of a hydroponically-grown cannabis plant with aggregate embedded in it
Cleaned root ball and main stem sitting atop the total amount of aggregate used to grow a single plant
LECA can be easily used for plant-growing substrate.
Deep water culture is a hydroponic method of plant production by means of suspending the plant roots in a solution of nutrient-rich, oxygenated water. Also known as deep flow technique, floating raft
An example of deep water culture in lettuce production.