Natural volcanic rock for biological filtration. EHEIM LAV consists of volcanic rock and is a natural product. Its rough, highly porous surface structure provides the purification bacteria with very good colonisation conditions. Because it is a natural product the granulate and small pieces in the packs are of different sizes.
- Bio-filter medium from natural volcanic rock
- Highly porous structure
- Very good conditions for colonisation of bacteria cultures
- Reusable (rinse carefully to clean)
- Suitable for fresh and marine water