Smoke in a bubble because the bubble will have a white smoke, which is wrapped with a metallic water carbon dioxide. Caused by the dry ice has melted in the water features. So the bubble bigger.
Smoke happens in bubbles. Since the bubble in the white smoke, a mist that enveloped with carbon dioxide. Caused by dry ice are soluble in water. Bubbles up itself.
The smoke generated in a bubble. Because the inside bubbles have white smoke, which is the water mist covered by carbon dioxide. Caused by dry ice can melt in the water features. The bigger bubble itself.