Wow check these out!! The stunning Pro-Sportfisher Stonefly product ranges. With the rivers getting lower and the water running slower it can be worth spending a little more time at the vice and create ultra realistic nymphs and fish them into the deep cold water and search out those big old brownies!! Full tying instructions are available on the Pro-Sportfisher web site. Pro-Sportfisher Stonefly Nymph Backs –Swimming Nymph shells-Stonefly Kits.