Sol Soils LECA Balls - For Propagation, Hydroponics & Pot DrainageSol Soils LECA Balls are lightweight expanded clay balls used for semi hydro growing, propagation, drainage layers, and custom soil blending. They are a versatile option for customers who want a cleaner growing medium that can hold some moisture while still allowing excess water to move away from the roots. Popular uses Semi hydro and hydro style setups Propagation vessels and clear containers Drainage layers at the base of pots Mixing into custom