These high quality, low cost pressure filters are ideal for preformed ponds and other small water features needing effective filtration with minimal investment. They offer dual filtration, with filter pads collecting solid debris while bio-media provides excellent biological filtration. Optional built-in UV clarifier offers crystal clear water. Sturdy filter housings can be buried up to cleaning ring for easy concealment Spring-loaded cleaning indicator shows when filter needs to be cleaned Filters are easy to disassemble and clean, making maintenance a snap! Includes multi-step inlet/outlet fittings to accept a variety of tubing sizes Model Max Pond Size Inlet/Outlet Max Flowrate Wt ECF10 1000 Gallons 0.5", 0.75", 1" 600gph 10lb ECF25 2500 Gallons 0.75", 1", 1.25", 1.5" 1350gph 14lb ECF40 4000 Gallons 2000gph 15lb Instruction Manual