Beautify your aquarium with Aqua Culture Small Pebbles Aquarium Gravel. Aquarium gravel provides a surface for beneficial bacteria to grow. These bacteria feed on fish waste and help keep your aquarium clean. It might seem counter-intuitive, but you need good bacteria for your aquarium to thrive. These bacteria feed on fish waste cleaning your tank naturally. Consequently, you won't have to scoop out fish waste as frequently. When you add plants and decorations, the 5lb of Small Pebbles Aquarium Gravel can be used to create hiding places for your fish. This creates an environment that is similar to their natural underwater habitat. These aquarium pebbles are ideal for any fish tank. You can beautify and clean your aquarium all in one step with Aqua Culture Small Pebbles Aquarium Gravel.