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

• Natural material: Volcanic rocks are 100% natural and safe, do not affect the pH or chemical composition of the water, and are suitable for freshwater and saltwater environments.
• Decorative: With their beautiful natural shape, volcanic rocks provide a colorful and detailed element to your tank or aquarium.
• Biological filter: These volcanic rocks serve as excellent natural biological filters, improving water quality and boosting oxygen levels.
• Versatile uses: Volcanic rocks are also suitable for rock gardens, planters, and wherever decorative stones are required.

Color: Black

Material: Volcanic rocks

Size: 5-8 cm

Weight: 10 kg