Creates Bubbles In Fish Tank While Attached To An Air Pump. Used To Increase The Dissolved O2 Level In The Aquarium. It Is An Important Instrument To Successfully Keep Aquatic Fish For Respiration Process, Oxygen Bubble Disk Air Bubble Disk makes bubbles with the help of air pump in the aquarium, Aquarium air stone and it will connect to air pump then you will get greater in your fish tank. An important instrument to keep aquatic fish breath easily. The Volume and pressure output of your air pump will determine how large an area of the disk will release bubbles, Fish tank bubble air stone, features round shape, white plastic housing, mineral stone oxygen diffuser.