vidaXL Red Volcanic Rocks - Natural Stones for Enhancing Aquarium Scenery, Improving Water Quality and Promoting Fish Health - Suitable for Gardens and Landscaping Uses - 25 kg, 1-2 cm

【Natural Material】: These volcanic rocks are 100% safe for use in both fresh and saltwater aquariums, without affecting the water's pH or chemistry 【Wide Applications】: Beyond aquariums, these rocks can be implemented in garden landscapes, planter beds, and various landscaping projects 【Decorative Element】: The red lava rocks offer a distinctive aesthetic appeal to your fish tank or aquarium, enhancing its beauty 【Biological Filter】: Serving as a natural biological filter, these volcanic rocks improve water quality, control nitrates, and increase oxygen levels in the tank 【Product Specifics】: The volcanic rocks are red in color, measure 1-2 cm, and come in a pack weighing 25 kg