That's a good idea, but in my case I'm going to go for a few each of the 3-4" and the 8-10", so it will be pretty obvious which is which in a 1/4 acre pond where all feed will be consistent among them.
Another quick question: any reason why I can't add a little variety by getting some Rosy Red Minnows as well? I know they also spawn prolifically so I thought be fun to add some to the mix, especially with the HSB coming in "at size" pretty much.