· Durable air stone diffuses water in every direction, creating dazzling underwater scenes
· Increases surface agitation and accelerates oxygen replenishment
·Helps release carbon dioxide buildup
· Small sizes fit common box filters and undergravel riser stems
· Larger models create a wall of decorative bubbles
· Fits standard airline tubing Hagen is dedicated to understanding the needs of your aquatic livestock and providing you with all the products required to keep them healthy and happy. The Hagen site offers further information on the entire range of products, as well as a wide variety of other pet related information.