Pro 3000 waterfall box--no media. Extra wide spillway for greater water aeration. Open swirl chamber for even and efficient water flow through the filter media. Mechanical and biological filtering for super clean water. Easily buried in ground to hide canister from sight. Clean once a year under normal use. Extra large capacity designed to increase biological filtration.. Dimensions are 18 X 10 X 10 UPC Code = 025033024816
