The biOrb Airstone fits in the base of the biOrb underneath the filter cartridge. It breaks up the flow of air into the aquarium, splitting it into a mass of fine bubbles. It also reduces noise from the air pump. Over time the tiny pores in the air stone can become blocked by dirt and limescale preventing air from getting through properly. Depending on your local water supply and the conditions in your biOrb an air stone can last anywhere from 3 months to 3 years. Changing the air stone from time to time is advisable.
Make sure this fits by entering your model number.
Assists with the oxygenation of your biOrb to maintain a healthy environment for your fish
Replacing the air stone every few months
Small and compact