Replacement Bio-Wheel for Penguin 99B, Eclipse 3, Eclipse Hex 5 and Corner 5 and Eclipse Explorer. Marineland Bio-Wheel should not be replaced unless damaged.
The water flow from your filter drives the Bio-Wheel. As the Bio-Wheel rotates, beneficial bacteria grow and thrive on its super dense surface. As water flows, the Bio-Wheel eliminates ammonia and nitrite on
- Irregular rotation of the Bio-Wheel is also normal
- Discoloration of pleated Bio-Wheel material is normal and desirable
- A Bio-Wheel rotating at any speed is working to eliminate toxic ammonia and nitrite