Volcanic rocks are the perfect addition to the bottom of your fish tank or aquarium, helping you create a beautiful underwater world!

• Natural material: 100% natural and safe, they do not affect the pH or chemical composition of the water.
• Decoration: With a beautiful natural shape, they provide a colorful and detailed element to your tank or aquarium.
• Biological filter: They serve as excellent natural biological filters, improving water quality and increasing oxygen levels.
• Various uses: Suitable for rock gardens, planters, and any application requiring decorative stones.
• Color: Black
• Material: Volcanic rocks
• Dimensions: 3-5 cm
• Weight: 25 kg