Tetra aquarium products are dedicated to helping seasoned hobbyists and beginners alike enjoy a successful, life-long aquatic experience. Tetra products build fish-, reptile- and pond-keeping confidence, one innovation at a time. Our complete line of Tetra nutrition, water care, filtration and aquarium products help make fishkeeping accessible to all hobbyists so they can benefit from its rewards. The Tetra Whisper 4i Internal Power Filter for 1-4 gallon aquariums uses small cartridges to provide three-stage mechanical, chemical and biological filtration. Water flows through the cartridge floss, trapping debris and fish waste, while Ultra-activated carbon removes odor and discoloration. The 27 GPH motor cycles a 4-gallon aquarium more than 6 times per hour. Easily change cartridges with the hinged lid for easy access. The space-saving design is easily hidden by décor and allows aquariums to be positioned as close as 1 inch from the wall. The adjustable, universal clip and suction cup allows for a variety of setups to easily adjust to high or low water levels. And, the cord organizer keeps everything neat and tidy. FOR 1-4 GALLON AQUARIUMS: Tetra Whisper 4i Internal Power Filter uses Small Whisper BioBag filter cartridges that are easy to change. 27 GPH MOTOR: The internal 27 GPH pump cycles a 4 gallon aquarium more than 6 times per hour. POWERFUL FILTRATION: Water flows through the cartridge floss, trapping debris and fish waste, while Ultra-activated carbon helps remove odor and discoloration.
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