The non-toxic mesh will keep the underlying Draining Substrate separated from the decorative terrarium top-layer substrate. It is ideal to create water parts and a biological filtration system in the terrarium using the Exo Terra BioDrain Terrarium Draining Substrate. The clean terrarium water can then be circulated in waterfalls, the Exo Terra Rain System or Dripping Plants. Use Bio Clean to speed up biological filtration capabilities.
