Hobby River Root is ideal for natural aquarium and terrarium design. The root pieces are designed with nature in mind, providing a natural appearance. The built-in caves of the River Roots offer excellent hiding places for fish. Additionally, they look even more natural when planted with real mosses and plants. The smooth surface makes cleaning dirt, such as algae, easier. They are made from safe, inert material (polyresin), which does not affect the water or clarity. Their lightweight design prevents possible damage to the glass. River Roots are durable and add aesthetic appeal to any aquarium.