Air Stone Disc - 4" Round

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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 Show more