The OASE BioSmart 18000 is a powerful flow-through filter (382 mm long, 555 mm wide, 408 mm high) for garden ponds up to 18 m³ and fish ponds up to 9 m³. Two blue filter foams, along with one green and one red filter foam, ensure optimal mechanical and biological filtration. The filter has a maximum flow rate of 5500 l/h and features two inlets with a universal stepped hose connector ranging from 1" (25 mm) to 1½" (38 mm) and a DN 75 outlet. It can be optimally combined with OASE UVC pre-clarifiers Bitron C 24 and 36 W as well as Vitronic 18 to 36 Watts. For cleaning, the flow-through filter is equipped with a cleaning lever for squeezing the filter foams, a bottom drain, and a clear water flushing connection. The manufacturer's warranty is 3 years.