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Volcanic Rock
- pH Neutral
- Recommended for where large debris is present:
(i) Outdoor ponds
(ii) Highly stocked aquariums with high waste producers (e.g. Goldfishes / Koi)
EHEIM LAV consists of natural extrusive rocks of volcanic origin. Its rough surface structure offers good colonization conditions to the useful purification bacteria. The natural origin is the reason for the different sizes and shapes in the packaging. EHEIM LAV can be rinsed out and reused.

