If this is just for winter mode you might want to put the pump either clam
shelled similar to: http://users.owt.com/jjspond/koipond/photos/set1/09.jpg
or in the filter without the pads, as long as there is screening to block
anything big from entering. The idea is to allow lots of surface area for
only small particles to pass thru, yet bigger particular can not clog the
entire surface at one time.

Next year you might want to seriously consider netting or screening the
pond:
http://users.owt.com/jjspond/koipond/photos/003.jpg ~ jan

----------------
See my ponds thru the seasons and/or my filter design:
http://users.owt.com/jjspond/

~Keep 'em Defrosted~
Tri-Cities, WA Zone 7a
To e-mail see website