FilterCLAY Filter Media is a 100% pure, organic media. Clay, that is finely ground into specific sized pellets (4-8 mm) and baked at a temperature of 1,200oC inside a rotary kiln. FilterCLAY does not contain artificial additives, pesticides or dyes, and is a perfect filter media for a variety of applications.

FilterCLAY Multi-Functional Filter Media
FilterCLAY's physical characteristics offer a protective environment for nitrifying colonies of beneficial bacteria while providing efficient solid waste capture and water polishing. 

FilterCLAY's Basic Properties 
Material: Expanded Burnt Clay 
Grain/Shape: Porous/Round 
Particle Size: 4-8mm 
Physical Properties:
Particle Density Dry: 1080 +/- 50 kg/M3 
Bulk Density: 600 +/- 50 kg/M3
Other FilterCLAY Properties: 
Optimal Surface Colonized Due to Porosity Level:
Surface Area: 232ft2/gallon 
FC-1: 1.7 cubic ft/65-75 pound bag.