12" (30 x Lees Filters 36" Wide Filter Original [Aquarium, Gallons) Undergravel Undergravel] Long

Lees Undergravel Filter is the key to providing a strong biological filtration system. Undergravel filters utilize your tanks 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 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 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 which resists splitting and cracking. Note: Must be attached to an air pump or powerhead (sold separately).