vidaXL Red Volcanic Lava Rocks 10-30 cm - Decorative Stones for Aquarium and Garden Landscape, Natural Bio-filter Stones, 10 kg pack

【Decor Element】: Vivid red hue volcanic rocks enhancing aesthetic appeal, adding interesting detailing to your fish tank or aquarium 【Landscaping Use】: Suitable for diverse applications- fish tanks, garden landscapes, planter beds and other decorative rock applications 【Natural Material】: Made of 100% natural volcanic rock, posing no harm to water chemistry, ideal for both saltwater and freshwater aquariums 【Product Specifications】: 10 kg pack of volcanic rocks; Red, measuring 10-30 cm for versatile usage in fish tanks, gardens, and landscaping projects 【Biological Filter】: Volcanic rocks serve as natural bio-filters, enhancing water quality, oxygen concentration, and nitrate control for a healthier habitat