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LECA is short of "light expanded clay aggregate" is a processed ceramic lightweight aggregate composed of small pebbles of the size of peanuts. Also known as Hydrotron, LECA is widely used in hydroponics using media bed or Dutch bucket techniques because of its lightweight and other favorable features. Clay pebbles are very popular among aquaponic farmer too.
Leca/Hydroton is made by heating certain clays to a high temperature of almost 1200C in a rotary kiln. This process expands the volume of material by 4-5 times creating ceramic pellets having a cellular inner structure. It is Green, Anti-shrinkage, Internal curing, Lightweight, Sound, and Thermal Insulation and Fireproofing.
Hydroton Specifications:
The clay pebbles are the most favorable medium for flood & drain systems. We have listed some do's and dont's to consider while working with them. When using for hydroculture (Aquaponics/ Hydroponics/ Aeroponics):