What is Airstone?
An '''airstone''' is an article made of soft stone, porous wood, or another material that allows [[air]] to be blown through it to produce [[Liquid bubble|bubble]]s in [[water]]. The air is blown through the stone by a tube placed inside the stone and attached to an electric pump. An airstone can be used in an [[aquarium]] (a tank or container for keeping fish) or a tank of water where plants are growing<ref>Mills Nutrients {{cite web|url=http://www.millsnutrients.co.uk/|title=''Why Are Mills Hydroponic Nutrients Always The First Choice''|access-date=15 October 2013|archive-date=23 October 2013|archive-url=https://web.archive.org/web/20131023224254/http://www.millsnutrients.co.uk/|url-status=dead}}</ref> in a [[hydroponics]] system.<ref>{{cite web|url=https://www.hydrohobby.co.uk/|title=Hydroponics - HydroHobby Hydroponics UK|website=www.hydrohobby.co.uk}}</ref>The airstone is used to blow bubbles into water to increase the amount of oxygen in the water. The stone may have very small holes to make fine bubbles or it may have bigger holes to make larger bubbles. == References == {{reflist}} [[Category:Aquariums]]