Marina Air Stone, Extendable Rectangular; Available in 2 sizes

• Multipurpose aquarium airstones produce decorative and functional air bubbles
• Introduces vital oxygen into aquarium water to accelerate oxygen replenishment
• Increases surface agitation for proper gas exchange - reduces CO2 buildup

Supply your aquarium with plenty of air bubbles for improved aeration and water movement. Designed to efficiently diffuse air for increased surface agitation. Promotes proper gas exchange to accelerate oxygen replenishment and reduce carbon dioxide buildup.

Extendible Airstones Two or more Extendible Airstones can be placed in line with one another for a spectacular bubble effect. They're encased in plastic for longer life and easy placement in the gravel. Fits standard airline tubing.