vidaXL Black Volcanic Rocks Lava Accent Stones Beads - Natural Aquatic Tank Decor Material for Fresh and Saltwater Environments

【Natural Material】: These volcanic rocks are 100% natural making them safe for propagation in both fresh and saltwater environments for various species 【Aquarium Decor】: Enhance the aesthetics of your fish tank with our black lava rocks that provide a colorful and detailed focal feature 【Generous Quantity】: Available in a 25 kg package, providing ample quantity to cover a sizeable area in any application 【Versatile Applications】: Suitable for a variety of landscaping applications including garden landscapes, planter beds, and aquariums 【Biological Filtration】: Acts as a natural biological filter that improves water quality, augments oxygen levels and controls nitrates, contributing to a healthier habitat