Posted: Tue Jun 28, 2005 11:54 am
They're tubes that attach to the end of a piece of airline tubing and a pump. They disperse air bubbles into the water. This aerates the water and also can give a nice look to the tank. As mentioned above, the bubbles can also give turtles something to look at/do (bite air bubbles). You can find them in pet stores near air pumps/tubing and similar accessories.

"You become responsible, forever, for what you have tamed." -Antoine de Saint Exupery-