Biological Bio Balls Filter Media for Aquarium Fish Tank Pond

What are Specifications:
-Material: PP
-Size: 32mm

What is Description:
-Suitable for salt water and fresh water.
-Release calcium and magnesium ions and cultures nitrifying bacteria.

What in the Box:
-1 x Bio Balls

Notes:
-The colours may vary slightly depending on different monitor displays.
-Please allow for minor discrepancies due to manual measurement.