A constant supply of fresh oxygen allows efficient biological filtration to take place without depleting oxygen fish need to breathe. Aeration devices also promote proper gas exchange and reduce the buildup of harmful gasses such as carbon dioxide. They also maintain a stable pH by counteracting the pH-lowering effects of carbon dioxide.
This Vinyl Airline Tubing is the industry standard for aquarium and ponds.
It is made from thick-walled vinyl to prevent collapse.
It is easy to cut with standard scissors. It is translucent, available in 3/16-in, 1/4-in, and 3/8-in. sizes, and is safe for fresh or saltwater. Sold by the foot.
Remember it is always a good idea to have extra on hand.