Check the listing for details. 9' x 9" Submersible PondMaster Pre Filter Unit w/ replaceable filter- 02205. Condition: New. Listed at 46.99 USD. PondMaster 500 Filter Unit Part: 02205 Dual filter elements offer particle filtering and chemical filtration of certain harmful compounds and unwanted colors. Filter media is easily rinsed or changed, less time consuming than many other filters of this kind. Use with pumps up to 500 GPH Low profile unobtrusive filter rests on pond bottom Easily snap in filter cartridge for quick media replacement Quick disconnect for easy removal from pump Versatile, can be used with many submersible pumps 9" x 9" Filter box with removable filter cartridge 1 Year Warranty These innovative low profile filters are designed to be unobtrusive in the bottom of the pond. Their large filter area means less frequent cleaning. More than one filter can be connected to a pump using a tee fitting. These filters offer mechanical, chemical and biological filtration.