Here's what we did to stock Richmond Mill Lake.
Coppernose bluegills from three sources including one from Alabama and two from Arkansas.
Northern strain bluegills from two sources, one in Arkansas and one in Oklahoma.
Redear sunfish from Arkansas.
Some could certainly be intergrades. Some are not. Some are coppernose. Some are northerns. When I electrofish, we always capture some small ones with that telltale bright colored copper tail. As they grow, the colors turn darker for some reason.
The water in Richmond Mill Lake is tannic, rich tea-color and fast flowing. Sunfish in there are always dark.
Bob, I know that you have trusted sources for your CNBG.
I also know that mixed with northern BG you will get some 1st generation intergrades.
I just don't see the pure grade characteristics of pure Floridaa CNBG that I have examined over the past 8 years of probably thousands of pure CNBG - even with dark color.
I don't thik it make a whit of a difference with the size and quality of those fish you guys have grown.....

George