Black volcanic rocks 10 kg 3-5 cm

Volcanic rocks are a perfect complement to the bottom of your fish or aquarium, 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 salted water environments. Decoration: With beautiful natural shapes, lava rocks provide a characteristic Colorful and detailed to your fish or aquarium. Biological Filter: These volcanic stones are excellent natural biological filters that improve water quality, increase oxygen levels and control nitrates to achieve a cleaner and healthier habitat. Volcanics are also suitable for gardens, gardeners and other uses of landscaping rocks.

• Color: black
• Material: volcanic rock
• Size: 3-5 cm
• Weight: 10 kg