Product: LECA Growing Medium (Lightweight Expanded Clay Aggregate)

Composition: 100% natural clay, fired and expanded in a rotary kiln at approx. 1100–1200°C. Contains no soil, no organic matter, no chemical additives; biologically inert.

Typical chemical composition: SiO₂ 55–65%, Al₂O₃ 15–20%, Fe₂O₃ 6–9%, minor CaO, MgO, K₂O, Na₂O.

Properties: porous reddish-brown pebbles, mixed size, pH neutral (~6.5–7.5), chemically inert, non-flammable, non-hazardous, no battery.

Use: hydroponic growing medium for net cups.