Base material: special mixture of volcanic obsidian/perlite
Color: white
Description: The material retains moisture and provides good soil aeration in the formicarium, protecting it against waterlogging and rotting. The granular layer should be used about 1-2cm high as the bottom soil layer in a farm.
Properties:
- inorganic, mineral product
- biologically and chemically neutral
- structurally stable
- stores moisture