Taken at the outflow of Julie’s Pond last year; this year there is no flow.  The green stuff is duckweed, the bane of people with ponds around here.  It is a floating plant and can’t survive even moderately rough water with any success; but if the conditions are right it can completely blanket a still pond during the summer. If I have to choose between it and algae though, I will take the duckweed any day.