This new in-pond prefilter/biofilter provides maximum pump efficiency, as well as highly efficient filtration. Product Features Mechanical pre-filtration for pumps Prevents flow reduction due to premature clogging Multiple pore sizes Progressive density dramatically reduces clogging Large specific area for bio-filtration E-Z Install: Connects to pump intake fitting - suitable for use with submersible pumps with a threaded or barbed inlet (connecting tubing not included) E-Z Clean: Minimal maintenance - lasts long before cleaning is needed - simply rinse in a bucket of pond water E-Z Integrate: Can be placed at any distance from the pump Product Specifications Small E-Z Biofilter Dimensions (dia. x length) 4.3" x 7.9" Max. Flow Rate (if used as a pre-filter) 2,000 GPH Max. Flow Rate (if used as a bio-filter) 660 GPH Connection Size 1-1/2" female thread, includes multi-step hose adapter to fit 1", 1-1/4" and 1 1/2" hose