The reason I said wait on the CNBG (poorly explained) was , as Theo notes , their survival. If you put in the common size available as intermediates (3-5 in.)and you have 10-12in. LMB they will be largely eaten as long as the LMB metabolism is up (water over 50+ degrees). If you can get large adult CNBG (7+ in.) then add them now and have fun feeding and watching. Read this link about adding stocker fish to a pond with adult predators. Also look at the second link for water quality basics and pond balance.

http://www.pondboss.com/ubb/ultimatebb.php?ubb=get_topic;f=7;t=000284;p=1#000000

http://msucares.com/pubs/publications/p1428.pdf

Most of all have fun on the pond journey. \:\)