Sunsun HW-703B 370 GPH 4-Stage External Canister Filter with 9W UV Sterilizer 4 Stage with UV 9W, 370gph Good for up to 100 gallon fish tanks Dimension: 11" L X 11" W X 16" H Built in 9 Watt UV sterilizer for controlling algae spores/bacteria and promoting clear water 3 Large Media Baskets for All Your Media Need