AIR DRIVEN ORNAMENTS BRING ANIMATION TO YOUR TANK: Aquarium ornament has live action when the treasure chest opens and closes. The driver floats around the trunk and holds on with this chain. The color of the treasure chest and/or diving suit may vary from the one in the picture. CHEST OPENS AND CLOSES WITH THE STEADY STREAM OF BUBBLES: Air bubbles rise from the treasure chest aquarium ornament helping to oxygenate the fish tank. Watch as the jewels get revealed everytime it opens. PROVIDES MUCH NEEDED AERATION FOR YOUR TANK: This aquarium decor provides both visual appeal as well as aerating your tank in a fun way. It attaches to 3/16 aquarium line and existing aquarium air pump (not included). SUITABLE FOR ANY SIZE OF FISH TANK: This aquarium decor measures approximately 4 inches in height and is suitable for any size fish tank. Sturdy base secures ornament to bottom of aquarium. MADE OF FISH SAFE AND DURABLE MATERIAL: this fish tank ornament is hand painted with detail and is safe for use in both freshwater and saltwater aquariums. Color of diver may vary.