Features:
1. Biosphere is a hollow sphere made of plastic material. It has a large surface area and can attach a large number of nitrifying bacteria.
2. When water flows through, there will be no resistance. The hollow structure can divide water into fine streams and smash large dirt. The filtering effect is excellent.

Specifications:
Color: Black
Material: Sponge + PVC
Size: 1.6cm/0.63" , 2.6cm/1.02"
Quantity: 10pcs
Usage: Rinse the biochemical ball and put it into the filter.

Notes:
1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!
2. Please allow 1-3cm measuring deviation due to manual measurement.

10pcs X Filter Bio-balls