vidaXL Red Volcanic Rocks Lava Stones for Aquarium and Garden Decoration, 10 kg, Natural Biological Filters

【Natural Material】: vidaXL's Volcanic Rocks are 100% natural and safe, ensuring no effect on the water's pH or chemistry 【Wide Applications】: Suitable for fish tanks, aquariums, garden landscapes and planter beds; these rocks offer versatility in usage 【Aquarium Decoration】: With their beautiful shaping, these red rocks add a colourful and detailed focal feature to your aquarium 【Biological Filter】: The lava rocks serve as natural biological filters, improving water quality, boosting oxygen levels, and controlling nitrates 【Product Specifics】: Red volcanic rocks, weighing 10 kg and sized between 3-5 cm, adding a vibrant natural accent to your tank or garden