Highly porous volcanic rock
- Ideally suited as the basis for every natural aquarium and aquascape.
- The porous structure supports reliable water circulation at the bottom, helping to prevent dead spots.
- Promotes the settlement of beneficial microorganisms; the open-pored design helps deliver optimal oxygen supply to the substrate layer.
- Rich in valuable minerals and trace elements to support a stable, healthy freshwater environment.
- Perfect as a base layer under aquarium substrate for long-term, natural-looking layout stability.
