JBL Sansibar Dark is a premium natural substrate designed specifically for aquariums. This dark-colored aquarium sand is ideal for all types of aquariums, particularly suited for crabs and shrimp setups. It provides a natural-looking base that mimics tropical water environments. Key features: • Natural dark substrate suitable for all aquarium types • Water-neutral and immediately ready to use • Ideal for tanks with crabs and shrimp • Suitable for 12-25L aquarium size (30-40cm) • 5kg package quantity • Mimics tropical water environments • Safe for aquatic life and plants The Sansibar Dark substrate is specially formulated to be pH neutral and won't affect your water chemistry. It creates an ideal environment for bottom-dwelling fish and crustaceans while providing an attractive dark backdrop for your aquatic plants and fish. The grain size is optimized for proper root development of aquatic plants while being safe for bottom feeders and burrowing creatures.