Small ponds no big deal go deeper or if a midge hatch go tiny like a 18-22 Griffins gnat.In larger water ,like a city reservoir,I have done well in low wind bright sunlight and north end
of sloughs.Here again I concentrate on midge hatches ---tiny nymphs(18-22)on a strike indicator for suspending fly,and tiny dry flies(18-22)in black especially but also grizzly as in Griffins gnat and bivisibles in black,brown,grizzly.This what has worked for me down here in central Alabama.