Leaves

I have to spend some time today moving leaves, so I can find my front steps. I was told by a neighbor to cover the koi pond, as a layer of leaves on the surface can stifle them. Who knew? I am also adding cold water bacteria and not feeding the fish when the floating thermometer says it's too cold, though the fish give me the evil eye when I go away without giving them their pellets. They are already at least an inch bigger than they were in August.