Changes

*A 'filter bed' containing an [[Bioretention: Filter media| engineered soil mix]]

*A 'filter bed' containing an [[Bioretention: Filter media| engineered soil mix]]

*A storage layer of [[Reservoir_gravel|coarse aggregate]]

*A storage layer of [[Reservoir_gravel|coarse aggregate]]

*Planting and a finishing surface layer (e.g. mulch)

*Planting and a finishing surface layer (e.g. [[mulch]])

         <strong>Additional components may include:</strong>  

         <strong>Additional components may include:</strong>  

*An [[underdrain]] to redistribute or remove excess water  

*An [[underdrain]] to redistribute or remove excess water