Those shiners in your photos are all common shiners and not emerald shiners.
With your large man made stream/falls I'm not surprised you are getting reproduction out of the common shiners. Common shiners do quite well in northern lakes where they can ascend a feeder stream to spawn. Your set up is like a miniature version of that.
Common shiners max out at about 2/3 the size of GSH, so they will likely be a little better forage for your YP and future WE.
When young, common shiners can be easily confused with emerald shiners. Emerald shiners usually max out around 3" with a giant being 5". Common shiners commonly reach 4"-6" and can push 8+".
Here is a few of the ones I was told were common shiners. They are different in that they have more of a square tail and not quite as shiny. If I am mistaken then maybe some one could ID these guys for me.
They have a smaller eye and will get bigger then the shiners and they are not as chrome like in colour. These that I am calling Emerald shiners are so so bright.
Cheers Don.
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