Name: Filter Bio Balls
Material: PVC
Colour: Black
Diameter: 16mm/0.63 inches
It's easy to maintain, and if it builds up too much, you can rinse it gently with water from an established aquarium as needed. For freshwater aquariums, saltwater aquariums, pools, and water garden ponds, aquaponics, fish hatcheries, etc.
Package contains: 100 x Bio Balls.