Marineland Replacement Bio-Wheel for Eclipse 2, Emperor 280B &400B FiltersThis Marineland Replacement Bio Wheel is for the Eclipse 2, Emperor 280B and 400B Filters. As the Bio Wheel rotates, beneficial bacteria grow and thrive on its super dense surface. As water flows, the bacteria eliminate ammonia and nitrite on contact. 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
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Marineland Replacement Bio-Wheel for Eclipse 2, Emperor 280B &400B Filters