Photo 1 of COOMATEC 2 Pack 4 Inch Silent Air Bubble Stones for Fish Tanks – High Dissolved Oxygen Bubble Stones for Aquariums and Hydroponics Systems, Ideal for 30-100 Gallon Tanks

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Photo 1 of COOMATEC 2 Pack 4 Inch Silent Air Bubble Stones for Fish Tanks – High Dissolved Oxygen Bubble Stones for Aquariums and Hydroponics Systems, Ideal for 30-100 Gallon Tanks