Reef construction is ideal for the dry, highly porous reef rock. The rock also blends in quite nicely with the current reef landscapes because of its structure and appearance. Real coral reefs in the mining areas are not harmed because it is made of genuine natural stone and is ready for seawater aquaristics. Exceptionally high inner surface—home for essential microorganisms Extremely calcareous No dead biomass contamination Ideal for constructing reefs Real natural stone Actual coral reefs are unharmed. Reef optics in real time The Kg sold