try an emerger. My version is a large orange klinkhamer with an orange bubble around the body. The bubble is two or three strands of antron yarn folded back to form a bubble. Antron is key due to the refractive properties of its triangular fibers. It resembles the bubble caddis form to float to the surface when they emerge. This pattern is very effective on my local rivers (bitterroot, clark fork, blackfoot, rock creek).