Description: Bio balls are filter media for freshwater and saltwater wet/dry systems. For efficient biological filtration. For use in fresh and saltwater aquarium and ponds. You may gently rinse with water from the aquarium if excessive buildup. Material: PVC Plastic, Color: Blue, Diameter: Approx. 1.5cm/0.59inch, Height: Approx. 1.6cm/0.63inch, Quantity: 100pcs. Specification: Material: PVC + Biochemical cotton Package Includes: 100 Pieces Bio Balls Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement
