Fish waste and other muck that accumulates on a pond bottom can be easily removed by a bottom drain
Feed up to 4 times daily based on water temperature and Koi activity level
5" FPT N/A WA-12 24" Acrylic Spillway 2000gph WA-12 36" Acrylic Spillway 3000gph WA-12 48" Acrylic Spillway 4000gph 2 15
Higher surface area for increased biological activity
Oase BioTec 4, 5, 10, 12, 18, 30, and 36 Replacement Parts (Discontinued Models) Tabs/Packs Fish waste and other muckShips directly from manufacturer Replacement parts are available for the following discontinued Oase filters: BioTec 4, BioTec 5, BioTec 10, BioTec 12, BioTec 18, BioTec 30 and BioTec 36. SKU UPC Code Description Compatible BioTec Filter 4 5 10 12 18 30 36 54030 706759540308 Red Filter Foam X X X 56739 706759567398 X 40977 706759409773 X X 54031 706759540315 Blue Filter Foam X X X 56738 706759567381 X 40978 706759409780 X X 10648 706759106481