Even and moderate bubbles will form a bubble wall in the fish tank, providing enough oxygen for your aquarium. | Measure 10 inch(25 cm). Connect it to the air pump with more than 7W and put it into the water to help the air pump to pump oxygen into the water. | Air bubble bars of the same size can be joined together. With a strong suction cup, it can be adsorbed on the wall or bottom of the fish tank. |