vidaXL Volcanic Rocks 25 kg Black 1 2 cm

The volcanic rocks are a perfect addition to the bottom of your fish tank or aquarium, helping you create a beautiful underwater world! Natural material: The volcanic lava rocks are 100% natural and safe which won't affect water's pH or chemistry and are suitable for both fresh and saltwater environments.Decoration: With beautiful natural shaping, the lava rocks provide a colourful and detailed focal feature to your fish tank or aquarium.Biological filter: These volcanic stones make for great natural biological filters that improve water quality, boost oxygen levels, and control nitrates for a cleaner and healthier habitat.Wide applications: The volcanic rocks are also suitable for garden landscapes, planter beds, and other landscaping rock applications.

【Versatile Decoration】: They serve as unique decoration for fish tanks, aquariums, garden landscapes, and planter beds 【Suitable for All Water Types】: Compatible with both fresh and saltwater environments, maintaining a healthy habitat 【Biological Filter】: Act as natural biological filters to improve water quality, boost oxygen levels and control nitrates 【Natural Material】: These volcanic rocks are 100% natural, safe, and does not affect the water's pH or chemistry 【Key Specifications】: The rocks are black in color, made of volcanic material, and the package contains 25 kg of 1-2 cm stones