Volcanic stones are the perfect addition to the bottom of your fish tank or aquarium, creating a beautiful underwater world.

Natural material: Volcanic stones are 100% natural and safe, without affecting the pH or chemical composition of the water, suitable for freshwater and saltwater.

Decoration: With a beautiful natural shape, they add a colorful and detailed element to your tank or aquarium.

Biological filter: These volcanic stones act as natural biological filters, improving water quality, enhancing oxygen levels, and reducing nitrate levels.

Versatile uses: Suitable also for rock gardens, planters, and decorative stone applications.

• Color: Red
• Material: Volcanic stones
• Size: 5-8 mm
• Weight: 25 kg