I suppose if u had a winch attached to the front of your truck u could run the cable out to one side of the pond (assuming that distance is not too long, since the winch cable is only so long) get a straight heavy piece of angle iron , maybe 4 to 6 feet long, attach each end of the angle iron to the winch cable, drop the iron in at one end of the pond, the winch at the other end, and winch it across the pond bottom, dragging whatever leaves, weeds and muck comes with it. Kind of like an iron rake!
