UNIVERSAL DESIGN Tetra Whisper 10i Internal Filter is an all-in-one air pump and water filter system%ocs%INTERNAL FILTER Mounts on the inside of your aquarium with clip (included)%ocs%CATCHES DEBRIS Dense dual-sided mesh filters debris and fish waste%ocs%AERATES WATER Air-driven design filters up to 80 GPH while oxygenating water%ocs%CONVENIENT DESIGN Uses medium easy to change Bio-Bag cartridges filter mounts inside aquarium making it possible to place tank flush against the wall