We go to wilderness areas with our canoes and fish lakes that are cleaner than Culligan bottled water. There are no carp in them. I am trying to imagine how bad a water source has to be when adding a bunch of muck stirring foreign invaders will improve it. Lets not forget about those jumping carp, we have them in our local Iowa rivers now as well. When I was a kid the Little Sioux river in Iowa would flow clear and it had seaweed, once we found lillypads even. Now, especially after all the rain, it is turbid mixture of corn stalks that never rot in the fields, hog poop, and dirt, with some h20 thrown in to keep it moving. Maybe, it needs more carp.