I have a quarter acre pond and it's pretty shallow. Deepest spot 5ft. I've tried different things to rid the pond with no success. Finally the farmer quit spreading crap across the road which when it rained the run off would end up in my pond. I've tried grass carp, that blue dye( don't remember actual name) barley bails. I'm afraid to nuke the pond with a chemical because I do have about $500 worth of koi in there. Also had an aerator at one time but pump burned out. Sent from my iPad using Bowhunting.com Forums