Little Giant 566112 Biologic Media Balls -30 Count, BM-30-PW, Black

APPLICATIONS: Biological media replacement for pond skimmers, waterfall filters and other pond filtration systems promotes the colonization of beneficial bacteria which breaks down pollutants GROWS BENEFICIAL BACTERIA: provides maximum surface area for beneficial bacteria growth REPLACEMENT MEDIA: designed for filters and skimmers such as Little Giant WF5 and WF10 Biological filters, SK2.5, SK5, and SK10 skimmers, and other filtration systems CONTENTS: Contains 30 biological media balls, 1.5-inches in diameter each SPECIFICATIONS: Each ball is 1.5 inches in diameter and covers 0.23 sq. ft. surface area per bio-ball; total 6.9 sq. ft. for 30-bio-balls; made of fish-friendly polypropylene