ClearFlo 1000 UVC Filter & 600 GPH Max Flo Pump Kit PT1741Pressure Flo Features: Cleaning indicator takes the guess work out of maintenance Patented Filter backwash system enables routine cleaning in seconds Mechanical, Biological, and integrated UV filtration work in unison proving clean and clear pond water Easy to Install & Maintain Max Flo Features: Cost saving, energy efficient 32W to 160W. Anti leaf ribs to assure continuing suction. Cage openings from 1 4" to 5 16" in diameter according to the pump