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 freshwater and saltwater environments.

Decorative: With their beautiful natural shape, volcanic stones provide a colorful and detailed element to your tank or aquarium.

Biological Filter: These volcanic stones serve as excellent natural biological filters, improving water quality, increasing oxygen levels, and reducing nitrate levels for a cleaner and healthier environment.

Various Uses: Volcanic stones are also suitable for rock gardens, planters, and wherever decorative stones are needed.

• Color: Black
• Material: Volcanic stones
• Dimensions: 10-30 cm
• Weight: 10 kg