Expanded Clay, also known as LECA (Light Expanded Clay Aggregate) or Hydroton, is a lightweight, phenomenal biological filter in aquaponics to develop the natural nitrogen cycle.

In addition to superior cation exchange in hydroponics, it is perfect as a potting mix additive to assist in soil aeration and can be used as a mulch layer on potting mixes to retain moisture.

German quality, expanded clay by Liaflor is especially suitable for hydroponics and aquaponics. It is a ceramic, purely mineral substrate made out of expanded clay, is germ-free and chemically and biologically neutral.

Liaflor drains and can be reused for years to come.