LARGE POWER FILTER: For 10- to 20-gallon freshwater and saltwater aquariums with self-priming, decoupled motor that reduces noise SLEEK DESIGN: Fits standard hoods and canopies seamlessly INCLUDED LARGE FILTER CARTRIDGE: Provides complete, three-stage filtration to help clean water HIGH-QUALITY ACTIVATED CARBON: Helps remove odors, discoloration and impurities BIOLOGICAL FOAM: Offers large surface area for beneficial bacteria, helping remove toxic ammonia and nitrite