Clarify your water naturally and promote gas exchange and increase dissolved oxygen levels Our Bio balls are 100% polypropylene making them a safe reliable bio filter media for fresh and saltwater. They are manufactured for use in koi and water garden ponds, freshwater fish tanks, saltwater aquariums, aquaponics, fish hatcheries and much more Ready to use filter bag. Convenient for use with your canister filter, power filter, or fish pond filter. The mesh bag is zipper designed and reusable. Size of media mesh bag: 17×13.4 inch Easy to maintain. Can be reused over and over again until it breaks Includes: 300 pieces bio balls in 1 media bag, approximately 4 Gal. Diameter of bio ball: 1.4 inch Pure bio ball and sponge inside bio ball Large area for the growth of nitrification bacteria Quantity50pcs /box Comes with Mesh bag
