I have no luck fishing on the lake here with flies. Today I was watching the trout feeding on the surface, but I couldn't see what it was. Then I looked closer and there was millions of little specks on the water. Too small to even see when i'm standing up. I had to get on my knees and get the light just right to see them.

Are the fish feeding on these specks? If so. What would I use for a fly?