NATURAL CORAL ROCK FOR AQUARIUM – 20 TO 70 CM SIZE

Coral rocks are excellent for marine and African Cichlid aquariums, acting as natural biological filters, providing essential hiding spots, and buffering pH to higher, more stable alkaline levels (7.8–8.4+). Popular options include dry reef rock, shelf rock, and aragonite-based limestone, which can be bought dry or “live” (pre-seeded with bacteria). They are generally not recommended for soft-water freshwater tanks.

• Biological Filtration: Billions of bacteria colonize the pores within the rock, breaking down toxic ammonia into less harmful nitrates.
• pH Stability: Because they are calcareous, these rocks slowly release calcium carbonate, helping to maintain an alkaline environment (high pH).
• Habitat and Shelter: The intricate textures and caves provide hiding spots for fish, crustaceans, and invertebrates, reducing stress and territorial bullying.