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 Whisper 10-30 Internal Filter for aquariums is the ultimate in quiet, convenient 3-stage filtration.  This submersible filter mounts on the inside of the aquarium, rather than hanging from the outside, making it possible to place the tank flush against a wall and easily hide with tank decor.  The air pump (included) provides bubbles that move water through the filter, efficiently filtering and oxygenating your aquarium.  The water flows through Ultra-Activated carbon, absorbing odors and discoloration, as well as through the dual-sided mesh of the Bio-Bag Filter, trapping debris and fish waste.  The  Whisper 10-30 Internal Filter adjusts easily to high or low water levels with a mounting clip.  Each unit includes the filter, air pump, 2 feet of airline tubing and one  Whisper Bio-Bag Filter cartridge. 
UNIVERSAL DESIGN:  Whisper 10-30 Internal Filter is an all-in-one air pump and water filter system.  USE IN: Aquariums 10-30 gallons in size. 
INTERNAL FILTER: Mounts on the inside of your aquarium with clip (included). 
CATCHES DEBRIS: Dense, dual-sided mesh filters debris and fish waste. 
AERATES WATER: Air-driven design filters water while oxygenating water. 
CONVENIENT DESIGN: Uses easy to change Bio-Bag cartridges; filter mounts inside aquarium, making it possible to place tank flush against the wall. 

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