Tetra Whisper 4i Internal Power Filter, Filtration

About this item This Whisper Internal Power Filter uses small filter cartridges and adjusts easily to high or low water levels. 27 GPH PUMP: The internal 27 GPH pump cycles a 4 gallon aquarium more than 6 times per hour. TWO FILTERS IN ONE: Cartridge floss catches debris and fish waste, while Ultra-Activated carbon removes odors and discoloration. SPACE-SAVING DESIGN: Your aquarium can be flush to the wall with the internal filter designed to clip on your tank wall and be hidden by décor. EVERYTHING YOU NEED IS INCLUDED: This pack contains the hinged lid, tank clip, internal filter and filter cartridge.