AquaTop's FORZA 25-40 Power Filter comes equipped with all the necessary filter media to ensure superior filtration: Mechanical, Chemical & Biological. The 25-40 utilizes a filtration chamber system with replaceable filter pad cartridges enhanced with Aquatop's Premium Activated Carbon, and the Bio Grid Insert maximizes the surface-area for your beneficial bacteria to colonize removing harmful ammonia from your aquarium water. The FORZA 25-40's innovative and advanced design is perfect to help you remove free-floating debris and harmful waste from the aquarium in both freshwater and saltwater. For best results, replace filter cartridges monthly. Features - Capable of Filtering 25-40 Gallon Aquariums - Mechanical, Chemical and Biological Filtration Included - High quality filter cartridges packed with Aquatop premium carbon - Adjustable flow rate - Extremely Quiet - Large Filtration Media Chamber Suitable for both Freshwater and Saltwater - 1+1 Extended Manufacturer's Warranty Specifications - Tank capacity: 25-40 Gallons - Flow Rate: 120 GPH - Power: 4W - Volt/Freq: 110-120V/60Hz