Substrate Volcanic 5-8 mm

Volcanic rocks are a great addition to the bottom of your aquarium, helping you create a beautiful underwater world! Natural material: Volcanic lava rocks are 100% natural and safe, not affecting the pH or water chemistry, and suitable for both freshwater and saltwater environments. Decoration: With their lovely natural shape, lava rocks add a colorful and detailed element to your aquarium. Biological filter: These volcanic stones make excellent natural biological filters that improve water quality, increase oxygen levels, and control nitrates for a cleaner and healthier habitat. Various applications: Volcanic rocks are also suitable for landscaping gardens, flower beds, and other stone uses for landscaping. Colour: Red Material: Volcanic rock Size: 5-8 mm Weight: 25 kg