BTW birchy, that will work great tagged off the "big red midge"... like as your bottom fly. Then both will be down deep and you'll pick up fish on both. Real bloodworms in the Bow are about a size 20, and pretty close to that color of red, have pumped 'em outta fish this time of year, almost every sample had numerous bloodworms in it. (mind you I haven't pumped a fish for 3 or 4 years, but I sure things haven't changed too much)