SunSun HW-402B 4-Stage Aquarium External Canister Filter with 9W UV Sterilizer 264 GPH Good for up to 75 gallon fish tanks Dimension: 9" L x 9" w x 15.5" h Flow rate: 265 GPH (1000l/hr) Built in 9 watt UV sterilizer for controlling algae spores/bacteria and promoting clear water Capable of mechanical, biological and chemical filtration