Mike :

Welcome to the PB forum. Bruce has given good advice. You are to far north to get the full benefit of CNBG (coppernose) and in my opinion regular BG will do better and give you better results. Not a good idea to mix HBG and any other lepomis (BG , RES, or others ) in the same pond. If you need to jump start your pond add some large BG to the mix. Example - stock 500 2in. BG-- 150 RES and 50 adult 4-6 in BG. If you do that and feed you will by fall have 3 year classes of BG 8in., 4 in. and 2in. At that point you could add a few 2in LMB or SMB ( 50 +-) and a dozen 6-8in. of the same. There are a number of ways to get there depending on your goals. Very important to have a good ,trusted source of fish as some will tell you one thing and deliver something else.