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

Natural material: Volcanic stones are 100% natural and safe and do not affect the pH or chemical composition of the water, suitable for freshwater and saltwater environments.

Decoration: With a beautiful natural shape, volcanic stones offer a colorful and detailed element to your tank or aquarium.

Biological filter: These volcanic stones serve as natural biological filters, improving water quality, enhancing oxygen levels, and reducing nitrates for a cleaner and healthier environment.

Varied uses: Volcanic stones are suitable for rock gardens, planters, and decorative rocks.

• Color: Black
• Material: Volcanic stones
• Dimensions: 1-2 cm
• Weight: 10 kg