Photo 1 of VIVOSUN Air Stones Disc 5 x 5 Inch with Shell for Aquarium, Fish Tank and Hydroponics Air Pump

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Photo 1 of VIVOSUN Air Stones Disc 5 x 5 Inch with Shell for Aquarium, Fish Tank and Hydroponics Air PumpPhoto 2 of VIVOSUN Air Stones Disc 5 x 5 Inch with Shell for Aquarium, Fish Tank and Hydroponics Air Pump