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Expanded Clay Balls

Expanded clay balls are pellets of inert clay that have been fired to create small marble-sized balls that can be used in hydroponic growing systems. Also sometimes known as LECA (lightweight expanded clay aggregate) or hydroton.

Expanded Clay or LECA (lightweight expanded clay aggregate) is an excellent growing medium which can be used in aquaponic farming, hydroponic growing systems, and conventional soil-based agriculture too.

Best used in our Hydropot series, but also a suitable medium for use in flood and drain or nutrient film technique hydroponic systems.

Note: Requires an initial wash to rinse clean. Soak for a few hours and stir around before draining.

For more information on growth mediums, check out our blog post on hydroponic growth mediums.

  • Comes in 1L and 5L options of expanded clay balls
  • Clay balls range from 8mm-16mm in diameter
  • Packaged in cardboard (to reduce plastic waste)
  • Easy to use and mess-free
  • Neutral pH
  • Inorganic and inert
  • The surface of the clay has tiny holes all over its surface. This allows better root aeration and increases the available surface area for nitrate crunching bacteria to grow (perfect for aquaponic systems).
  • The nutrient water will dry out before the nutrients have the chance to turn to algae.