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

• Natural material: 100% natural and safe, they do not affect the pH or chemical composition of the water, suitable for freshwater and saltwater environments.
• Decorative: With a beautiful natural shape, they provide a colorful and detailed element to the tank or aquarium.
• Biological filter: They serve as excellent natural biological filters, improving water quality and boosting oxygen levels.
• Various uses: Also suitable for rock gardens, planters, and decorative stones.

Color: Black
Material: Volcanic rocks
Dimensions: 3-5 cm
Weight: 10 kg