Pondmaster® Filtration Systems are small pond filters designed to stay hidden in the bottom of the pond or water garden. These submersible pond filters are mainly for mechanical filtration, but larger sizes also include chemical and biological filter media. Large filter area means less frequent cleaning. More than one filter can be connected to a pump using a tee fitting. Dual filter elements offer particle filtering and chemical filtration of certain harmful compounds and unwanted colors. The filter media is easily rinsed or changed, less time consuming than many other filters of this kind. For In-Pond use only Connects to more than one pump SKU Name Max Flow Rate Pond Size Outlet Dimensions 02205 PM500 500gph Small 3/4" 9" x 9" 02211 PM1000 1000gph Small-Medium 3/4" 12" x 12" 02200 PM2000 2000gph Medium-Large 1" 12" x 24" SKU Name Filter Media Additional Features 02205 PM500 Carbon, Polyester Quick Disconnect from Pump 02211 PM1000 Carbon, Polyester Connects to Pump Intake; Locking Handle 02200 PM2000 Polyester, Biological Foam Connects to Pump Intake; Carrying Handle PM500 Instructions PM1000 Instructions PM2000 Instructions