Beckett In-Line UV Pond Filter9 Watt UV Clarifier Filter (pump not included) is for ponds up to 650 gallons in size. This filter is for use outside of the water and it will help reduce green water in your pond. Requires a pond pumps between 400 800 GPH. The 9 Watt UV Filter comes with a 16 foot cord and is not submersible. 9 Watt Germicidal bulb keeps pond water clean and clear Power Requirements 115V, 60HZ, . 24 Amp Includes 9 watt germicidal UV bulb Fits 1 2" and 5 8" Tubing