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, they do not affect the pH or chemical composition of the water and are suitable for freshwater and saltwater environments.
• Decoration: With a beautiful natural shape, volcanic stones add a colorful and detailed element to your tank or aquarium.
• Biological Filter: These volcanic stones serve as excellent natural biological filters, improving water quality, boosting oxygen levels, and reducing nitrates for a cleaner and healthier environment.
• Versatile Uses: Suitable for rock gardens, planters, and anywhere decorative stones are needed.

Color: Black

Material: Volcanic stones

Size: 5-8 cm

Weight: 10 kg