Air Stone Disc - 4" Round

These air discs include suction cup feet to prevent flipping. The air disc's 3/8" 90-degree elbow fitting ensures the airline connects smoothly to your fitting and prevents airline kinking at the fitting base.  Pond aeration is one of the most important methods of keeping your pond balanced and healthy. In nature the pond ecosystems naturally inject oxygen into the water. In a backyard pond it is essential to add air into the system. 

• 4" Wide 
• Easy to clean
• 3/8" Barbed inlet 
• Self-weighted
• Long lasting