Originally Posted By: Cecil Baird1
True. I do know from experience small bluegills will swim up a 6 inch pipe that is over 200 feet long against a fairly decent flow of somewhat less than 45 gpm. Ever since then I have pulled up my flexible pipe inflow quite a bit if in use to keep fish from swimming up it. I don't like fish species where I don't want them. I go to too much trouble to prevent that.


I think that is where Bob Lusk is spot on. Many of the magically appearing fish aren't heron additions but simply fish using skinny waters to make a new pond their home...