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50Pcs/lot 16/26mm Black Aquarium Filter Bio Balls Fish Tank Air Clean Pump Canister Biochemical Cotton Filter Media Tools
The bio-sponge inside provide more surface area for growth of beneficial Bio-Spira bacteria BIO-Balls do not require replacement unless damaged or destroyed In the event of excessive buildup, you may gently rinse with water from an established aquarium, if desired Dimensions:Diameter of bio ball: 16mm,26mm Includes:50pieces Bio Balls






