Bio-Balls (Bio-Spheres) - Sinking or Floating (2 Sizes)
A compact polyethylene media. Select either 98 sq.ft. (CBB15) or 160 sq.ft. (CBB1) of surface area per cubic ft. Round shape with positive or negative buoyancy. These balls, with their small void spaces, are popular for clean water applications like tropical fish aquariums.
Sold by the cubic foot.
