airstone
airstone · airstones
A piece of aquarium furniture, traditionally limewood or porous stone, whose purpose…A piece of aquarium furniture, traditionally limewood or porous stone, whose purpose is to diffuse oxygen gradually into the tank, eliminating the noise and large bubbles of conventional air filtration systems.
Dictionary text adapted from Wiktionary (Wiktionary contributors, CC BY-SA 4.0) and Open English WordNet / Princeton WordNet (CC BY 4.0, WordNet License); shared under CC BY-SA 4.0. Example sentences and recordings are credited where they appear.