Imagine a filter media that is lightweight, strong, eco-friendly, and highly porous all in one. That’s the power of Expanded Clay Aggregate (ECA®).

Engineered for maximum filtration performance, ECA® is transforming drinking water systems, industrial treatment setups, and stormwater infrastructures with its innovative design.

Read on to discover why ECA® is the smart choice for forward-thinking filtration systems and how it can enhance your next water treatment project.

Expanded Clay Aggregate (ECA®) is a next generation, mineral based filtration medium made from natural clay fired at 1200°C. This process creates a lightweight aggregate with a honeycomb like internal structure, leading to high porosity and durability.

• Density Range: 200 kg/m³ to 800 kg/m³
• Forms: Available in both Crushed and Rounds
• Inert, Sterile, and Non-Toxic
• 100% Eco-Safe and pH Neutral
• Compatible with physical, chemical, and biological filtration systems

ECA® has a unique porous microstructure that allows deep bed and surface filtration simultaneously. Unlike sand or gravel, its internal cavities provide a three dimensional filter matrix, improving particulate capture without clogging rapidly.

• Primary & Secondary Treatment: Removes suspended solids, oils, and organics
• Tertiary Treatment: Ideal for polishing stages and nutrient removal
• Rainwater & Greywater Harvesting: Long-term biological filtration efficiency

• Made from natural clay with no chemical additives

• Reusable and recyclable after system life cycles
• Lower backwash frequency reduces water waste and energy consumption

• Long service life: Does not degrade or compact easily

• Reduces operational costs due to minimal maintenance needs

• Works in combination with sand, anthracite, and activated carbon

• Serves as the lightest top layer or support base media in multimedia filtration beds

• Municipal Water Plants

• Desalination Pre-treatment
• Industrial Effluent Units
• Constructed Wetlands
• Stormwater Management Systems
• Greywater Recycling Units