Penn-Plax As6Q 4-Pack Aqua Mist Air Stone Cylinder Aerator For Fish Tank | Easy To Install To Your Pump | Aerates Your Tank

Each Aqua-Mist Air Stone Is A 7/16 Inch Green Colored Aerator For Your Tank. When Added To Your Aquarium, It Produces A Steady Flow Of Bubbles, Providing A Better Supply Of Oxygen To Your Fish. It Attaches Easily To Any Air Pump With Standard 3/16 Airline Tubing (Sold Separately). The Air Stone Can Be Positioned Anywhere In Your Tank, Either Blend It In With Surroundings Or Hide It Under Gravel. Use The Penn Plax Aqua-Mist Air Stone Cylinder For A Beautiful Aquarium And Healthy Fish.