Hagen part #A-982 Extendable10" (25 cm) 1 piece Blue Attach more than one together for stunning bubble walls Durable airstone diffuses water in every direction Creates a dazzling underwater scene Increases surface agitation Accelerates oxygen replenishment Helps release carbon dioxide build-up Creates a wall of bubbles Fits standard airline tubing The Hagen Elite Aqua Fizzzz 10" Airstone is ideal for adding accents in any aquarium. The airstone diffuses air, creating water movement. The Elite airstone also increases surface agitation, accelerates oxygen replenishment and helps release carbon dioxide build-up. Simply connect the air stone to your airline tubing and place it in desired location. Add more than one in line for spectacular results.