Polar Aurora 4-Stage External Canister Filter with 9-watt Uv Sterilizer, 525 GPH Good for up to 200 gallon fish tanks.Flow rate: 525 GPH (2000L/hr). Pump Power: 55W Built in 9 Watt UV sterilizer for controlling algae spores/bacteria and promoting clear water Free Media Set 4 media trays capable of handling your choice of filtration media; Comes with an adjustable spray bar. This is a helpful feature if you want to adjust the output flow from the filter Convenient self-priming pump that eliminates the need for manual siphoning; Single valve disconnect & priming pump ease routine maintenance The three flexible media trays allow you to add other filtration media such as SunSun's activated carbons, ceramic rings or bio-balls to achieve excellent mechanical, chemical, and biological filtration. 4 stages of filtration 9w UV powered 1 10-120V 50-60Hz In tegrated UV kill switch Co mes with Complete kit 11. 5&#034;x11.5&#034;19&#034; in Dimensions Can adjust to fit larger gallon tanks Elimi nate all harmful viruses and bacteria 1x Input and Output Discreteness 1x Barrel Head 1x Main Canister Body 1x 9W UV Light Bulb 2x 5 feet lengths of flexible tubing 1x Draining Tray Cover 4x Draining Trays 1x Output Curvy Bar 1x Input Curvy Bar 2x Connected Bars 2x Spray Bars 1x Spray Bar Cover 1x Dirtiness entrance 1x Joint of Dirtiness entrance 3x Input Bars 1x Input Cover Broken UV light/glass cover: These parts are fragile, if they were damaged when you received them, pleasesend us an email and some pictures about it, we will resend you a replacement. Missing pieces: We may miss some pieces when packing, please send us an email if any part is missing. Leaking: Please check if the glass cover was broken. If not, make sure all pieces are assembled correct, adjust the o-seal ring on the top lid and put the filter lower than your tank, and make sure water can get through the green hoses soomthly. Loud noise from the motor: You may need to check the impeller on the top lid if there is anything in it, and clean it. And then try it again. Not pump water: Press the blue button on the top lid to compel the extra air out of the canister. And try it again. The flow is slow: Add enough water into the tank, and adjust the cotton and medias. Note: Push the glass tube all the way down, then twist it to lock in place.