Here is something that I had forgot about. If you take the white insides out of parachute cord, and use it instead of white yarn, it works great. It really puffs out in the water.
I'm gonna have to try that again myself next time out.
I read about using white yarn on one of the other threads and was curious as to what shade of white it is-i.e. cream colored or actually white and under what water conditions is it most productive.