Oase BioTec ScreenMaticFlow through filters with biological and mechanical filtration clean and clear pond water which flows back down to the pond by gravity Oase BioTec ScreenMatic2 automatically separates debris using the self cleaning screen, depositing coarse debris into the removable tray Adjustable intelligent cleaning sensor mounted above screen detects buildup of debris and automatically empties screen into debris tray High efficiency filter system features 3