 
                     
                    | Substrate | Optima | 
|---|---|
| Formula code | 601 | 
| pH range | 5.5 – 6.5 | 
| Water Holding Capacity (L/kg) | 4.0 – 5.0 | 
| Air Filled Porosity (%) | 30 - 40 | 
| Electrical Conductivity (mS/cm) | < 0.5 or Unwashed | 
| Material Grade | 2-10 mm husk chips | 
| Description | Graded husk chips | 
| Applications | Water filtration |