Natural volcanic substrate for aquascaping.

Main Features:
• Volcanic rock substrate as a stable base for rock and root wood structures: A substrate designed for aquascaped tanks.
• Essential substrate for natural tanks: Porous volcanic rocks ensure water circulation at the bottom. Provides plant roots with organic nutrients.
• Strong plant growth: Ideal oxygen supply and circulation through the open-pore structure. Long-term supply of nutrients and minerals.
• Safe, non-slip base: Volcanic rocks interlock tightly. Ideal as a stable foundation.