If it were me I would look at each RES before putting it into the pond just to make sure you don't have an unwanted GSF or HBG in the mix.

I got a few additional RES from a fish truck after my initial stocking and here is what was in the mix. eek The HBG/GSF never made it into my pond. Top two are RES, bottom two???

Small RES should look like this, the red on the ear tab might not be visible on RES under 3".