Lees Original Under Gravel Filter for Aquariums

Lees Under gravel Filter is the key to providing a strong biological filtration system. Aquarium under gravel filters utilize your tank's gravel substrate as a filtering surface area while providing oxygen to help aerate your aquarium water. Provides biological filtration and aeration to aquarium Includes airline diffusers, carbon cartridges, Discard-A-Stone, and fish-saver feature For use in fresh and saltwater aquariums Must be attached to an air pump or powerhead (sold separately) Placed on the bottom surface of the aquarium, the filter plates utilize the gravel bed as a source of surface area for bio-filtration and provide oxygen by recirculating the water down through the media and up through the uplift tubes. The advanced design allows separate plate installation and features an optional flow-thru setup, which can be used with a powerhead. Adjustable 1" uplift tubes provide superior water circulation. The filter is made of special, premium quality plastic that resists splitting a