Light Tungsten or Brass Beadheads patterns, with a tip of the hat to The Tenkara Guides for two great patterns.
Shetland Spindrift wool bodies, Whiting Brahma Hen hackle, Shetland sheepdog collar, Barbless Klinkhamer hook. The deep fishing answer for average weight rods. Choose between a lighter tungsten bead fly that gets down deep and is easier to cast, or a very brass bead for use on ultralight weight rods. On-stream, wipe it in the algae to absorb stream aroma and hide yours. Sold as three flies.
NOTE: Use caution when casting bead-heads which can break a rod tip. Choose an unweighted or under-body weighted fly if you are uncertain.
Jim, the flies have been incredible. Just got back from a 3 day fishing trip and caught over 50 rainbows and browns, with many of them between 12-18". SH in California