The Tetra Whisper 10i Internal Filter for aquariums is the ultimate in quiet, convenient 3-stage filtration. 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 s and discoloration, as well as through the dual-sided mesh of the Bio-Bag Filter, trapping debris and fish waste. Filters up to 80 GPH while oxygenating water. The Tetra Whisper 10i Internal Filter adjusts easily to high or low water levels with a mounting clip.