vidaXL Volcanic Rocks, Natural Aquarium Decoration and Biological Filter, Suitable for Garden Landscaping and Planter Beds, Black, 5-8 cm, 10 kg

The volcanic rocks are a perfect addition to the bottom of your fish tank or aquarium, helping you create a beautiful underwater world! Features: Natural material: The volcanic lava rocks are 100% natural and safe which won't affect water's pH or chemistry and are suitable for both fresh and saltwater environments Decoration: With beautiful natural shaping, the lava rocks provide a colourful and detailed focal feature to your fish tank or aquarium Biological filter: These volcanic stones make for grea...