Marineland/Aquaria Bio Wheel Assembly Replacement for the Eclipse Filtration & Illumination Systems 1, 2 and 3. Marineland/Aquaria 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 contact.