The kit includes a resin volcano ornament and an air stone. Which can add a beautiful extra effect of overflowing lava and increases oxygen and creates bubbles in fish tank while attached to an air pump. Please soak the volcano & air stone in water for a while before putting it into your fish tank. Volcano Size: 4.4 x 2.8 inch (D*H), Weight: 5.4 oz. Air Stone Weight: 0.02 lb.
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