Compact acrylic sump filter for effective 3-stage aquarium filtration Combines proven BIO-Wheel filtration with easy-to-use cartridges Customize chemical media cartridges for enhanced water quality Exceptional sump filter dramatically simplifies filter maintenance and media change. The Model C3 employs a cartridge-based filtration system that makes filter maintenance as simple as replacing the Emperor Rite Size E Filter Cartridges . This compact acrylic sump filtration system is loaded with convenient features, making it the ideal choice for small and medium aquariums up to 60 gallons in size. BIO-Wheel filtration combined with (2) Emperor Rite Size E Filter Cartridges (filled with Black Diamond Premium Activated Carbon) ensures effective biological, mechanical and chemical filtration for clean and healthy aquarium water. Easy-load media containers allow custom chemical filter media enhancements to suit your filtration needs. Clever, compartmentalized sump design allows easy pump placement and provides ample room for sump accessories including a protein skimmer. User-friendly sump filtration system ideal for freshwater or saltwater aquariums.