Bio-Balls - 1 Cubic Ft. - Approx. 660 balls

Can be used as a loose media or put in mesh bags for easy removal and cleaning Will not compact like other soft media, reduces channeling of water around media Available in 1/3, 1 or 4.5 cubic foot boxes 1 1/2″ in diameter, black in color These plastic Bio-Balls are a great media for use in all types of filters