Hagen part A-980Extendable5.5" (14 cm)1 pieceBlue Attach more than one together for stunning bubble wallsthe durable airstone diffuses water in every directionCreates a dazzling underwater sceneIncreases surface agitationAccelerates oxygen replenishmentHelps release carbon dioxide build-upCreates a wall of bubblesFits standard airline tubingThe Hagen Elite Aqua Fizzzz 5" Airstone is ideal for adding accents in any aquarium. The air stone diffuses air, creating water movement. The Elite air stone 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.