vidaXL Black Volcanic Rocks 25kg - Natural Aquarium Stones/Landscaping Rocks for Aquarium/Outdoor Decor - 5-8 cm Size

The volcanic rocks are a perfect addition to the bottom of your fish tank or aquarium, helping you create a beautiful underwater world! Features: 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 grea... - Manufacturers part number: 3217185

• 【Decor Element】: With their beautiful natural shaping, these black lava rocks enrich the aesthetics of any aquarium or landscape
• 【Versatile Usage】: Ideal for both freshwater and saltwater fish tanks. Also suitable for garden landscapes and planter beds
• 【Biological Filter】: They act as a natural biological filter, improving water quality and controlling nitrates for healthier habitats
• 【Generous Quantity】: Each pack contains 25 kg of volcanic rocks, each measuring 5-8 cm in size
• 【Natural Material】: The vidaXL volcanic rocks are 100% natural, safe, and won't affect water's chemistry or pH levels