When choosing flies, go for bugs that are bright and a little gaudy so that fish can differentiate them in the sea of murk. Try black, chartreuse, purple, red, or white patterns, especially ones with a bit of sparkle to catch the eye of a holding trout. I’ve found purple Prince nymphs (shown) work well when bounced off the bottom in slow eddies. Many anglers break out splashy streamers, too, such as a Zonker, Rooster Tail, or Double Bunny. Go the extra step by adding rattles to your streamer, or any addon that will draw attention to the bug.