vidaXL Volcanic Rocks Lava Accent Rocks Volcanic Lava Stones Beads 10 kg Black

【Biological Filter】: These stones act as natural biological filters, improving the water quality, increasing oxygen levels, and controlling nitrates for a healthier habitat 【Stunning Decoration】: The black lava stones add color, personality, and natural beauty to your fish tank or aquarium, enhancing the overall aesthetics 【Versatile Applications】: Not just for aquariums, these rocks are also ideal for garden landscapes, planter beds, and other landscaping rock applications 【Specifications】: The product contains black volcanic rocks weighing 10 kg, with a size range of 5-8 cm, perfect for various applications 【Natural Material】: These Volcanic rocks are 100% natural, safe, and unaffected by water's pH or chemistry, suitable for fresh and saltwater aquariums