High Performance Filters!These filters offer significant improvements in performance and convenience over the successful Biotec 5 and 10. The advanced features in these filters, such as ability to handle high flow-rates and re-introduce oxygen into the water circulation, offer many benefits in a well-designed and maintenance-friendly package. Highly effective reduction of ammonia and nitrites Convenient built-in filter foam cleaning mechanism Integrated drain removes sludge build-up Built-in visual maintenance indicator display Clean Water Guarantee 2 Year Warranty Ships Free and Fast Filter Features Filter Specifications Application: Gravity Filter Filter Pads Blue: 2 Max Pond Size: 1600 Gallon Filter Pads Red: 2 Max Flow Rate: 1500 GPH Filter Pads Green 1 Outlet Connection: DN 70 Color: Black Intake Connection: 1 1/2 in. Warranty: 3 Year