Clay Hydroponic Aggregate Pebbles, 8mm - 16mm

These expanded clay aggregate pebbles measure 8 mm – 16 mm in diameter and are sold by volume (approx. 340 g per litre), offering a lightweight, porous growing medium ideally suited to hydroponics and a variety of planting systems.

Produced from natural clay fired at high temperatures, these larger pellets deliver outstanding aeration and balanced moisture retention, ensuring roots have constant access to oxygen while avoiding waterlogging. Their pH-neutral nature stabilises nutrient solutions, fosters vigorous root growth and reduces the risk of root diseases.

Key Features

• Size & volume sale: 8 mm – 16 mm pebbles sold by volume (approx. 340 g per litre), not by weight.
• Enhanced aeration: Larger interstitial gaps promote superior oxygen flow to the root zone.
• Optimal moisture balance: Retains sufficient water while ensuring effective drainage to prevent waterlogging.
• pH-neutral & reusable: Provides a consistent growing environment and is simple to clean for repeated use.
• Versatile application: Perfect for hydroponics, aquaponics, terrariums, orchid cultivation or as a decorative top-dressing in soil-based setups.

Select the required size, colour or pack option before ordering. UK delivery is included in the displayed price.