Leca Balls are also known as leca, clay balls, hydration, or hydro balls. You may have seen these trending as a propagation method to establish houseplant cuttings. Whatever you choose to call it, Leca is just an acronym for lightweight expanded clay aggregate. Leca can be used for propagation or mixed in with soil to aid the hydration of plants.
 
Small : 250g
Medium : 500g
Large : 1.1 Litre