Black volcanic rocks 10 kg 1-2 cm

Volcanic rocks are a perfect complement to your fish tank or aquarium substrate and help you create a beautiful underwater world! Natural material: Volcanic lava rocks are 100% natural and safe, do not affect pH or water chemistry, and are suitable for both fresh and saltwater environments. Decoration: With beautiful natural shapes, lava rocks provide a colourful and detailed feature for your fish tank or aquarium. Biological filter: These volcanic stones are excellent natural biological filters that improve water quality, increase oxygen levels, and control nitrates for a cleaner and healthier habitat. Diverse uses: Volcanic rocks are also suitable for gardens, planters, and other landscaping rock uses.

• Colour: Black
• Material: Volcanic rock
• Size: 1-2 cm
• Weight: 10 kg