EasyPro ECF10U Pressurized Filter with Built-In UV for Crystal Clear Water, Ponds up to 1000 Gallons High quality, low cost pressure filter Dual filtration--filter pads collect solid debris while bio-media provides excellent biological filtration Spring loaded cleaning indicator shows when filter needs to be cleaned Filters are easy to disassemble and clean, making maintenance a snap Sturdy housing can be buried up to cleaning ring for easy concealment