vidaXL 25 kg Red Volcanic Rocks - Ideal for Fish Tanks, Aquariums and Garden Landscaping - 10-30 cm Natural Lava Stones

【Versatile Decoration】: These appealing Red lava rocks aid in creating vibrant aesthetics for fish tanks or aquariums as well as garden landscapes 【Sizable Rocks】: With a substantial 25 kg weight and sizes ranging from 10-30 cm, these rocks lend a robust and natural charm to any setting 【Biological Filter】: Serving as natural biological filters, they improve water quality, oxygen levels, and control nitrates, ensuring a healthier habitat 【Suitable for All Environments】: It's adaptable for both fresh and saltwater environments, heightening the overall appeal and visual interest 【Natural Material】: The vidaXL Volcanic Rocks are made of 100% natural and safe volcanic rock, without affecting water’s pH or chemistry