Lees Undergravel Filter is the key to providing a strong biological filtration system. Undergravel 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 aquariumIncludes airline diffusers, carbon cartridges, Discard-A-Stone and fish-saver featureFor use in fresh and saltwater aquariumsPlaced 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. This item is in the category "Pet Supplies\Fish & Aquariums\Filters". The seller is "savedollarstores" and is located in this country: US. This item can be shipped worldwide.