Substrate Volcanic 1-2 cm

Volcanic rocks are a perfect addition to the bottom of your aquarium, helping you create a beautiful underwater world! Natural material: The volcanic lava rocks are 100% natural and safe, they won't affect the pH or the water chemistry and are suitable for both freshwater and saltwater environments. Decoration: With their beautiful natural shape, the lava rocks provide a colourful and detailed centrepiece for your aquarium. Biological filter: These volcanic stones make excellent natural biological filters that enhance water quality, increase oxygen levels, and control nitrates for a cleaner and healthier habitat. Various applications: Volcanic rocks are also suitable for garden landscaping, flower beds, and other landscaping stone applications. Colour: Black Material: Volcanic rock Size: 1-2 cm Weight: 10 kg