Marineland BIO-Wheel Emperor Assemblies for PF280B, PF280BD, PF400B, PF400BD, and PFE2 Filters

Replacement Bio-Wheel for the Eclipse 2, Emperor 280B & 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.