Turn your aquarium into an active fireland with the Penn Plax Volcano with Air stone Aquarium Décor. This awesome, detailed volcano comes with an airstone that oxygenates the water to create bubbles. This volcano ain"t so dormant! Fish love bubbles, too. Or so we hear. It looks cool. * Crafted from strong and durable resin * Non-toxic and fish-safe * Makes a perfect addition to your aquarium * Provides fish with an obstacle to swim around * Dimensions: 5.75W x 5H in.