Clay Hydroponic Aggregate Pebbles, 4mm - 8mm

These expanded clay aggregate pebbles measure 4 mm – 8 mm in diameter and are sold by volume (approx. 360 g per litre), providing a lightweight, porous growing medium ideal for hydroponics and other planting systems.

Crafted from natural clay and expanded under intense heat, these larger round pellets maintain exceptional aeration and moisture retention, ensuring roots receive ample oxygen while preserving optimal hydration. Their pH-neutral properties buffer nutrient solutions, encourage vigorous root development and minimise the risk of waterlogging and root rot.

Key Features

• Size & volume sale: 4 mm – 8 mm pebbles sold by volume (approx. 360 g per litre), not by weight.
• Superior aeration: Larger void spaces deliver excellent oxygen flow to roots.
• Optimal moisture retention: Balances water holding and drainage to prevent waterlogging.
• pH-neutral & reusable: Provides a stable growing environment and is easy to clean for multiple cycles.
• Versatile application: Perfect for hydroponics, aquaponics, terrariums, orchid pots or as a decorative soil top-dressing.

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