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. They are suitable for both 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 are excellent natural biological filters, improving water quality and enhancing oxygen levels.
• Varied uses: Volcanic stones are also suitable for rock gardens, planters, and wherever decorative stones are required.
• Color: Black
• Material: Volcanic stones
• Dimensions: 1-2 cm
• Weight: 25 kg