Survey the pond and if your assessment proves correct then take out LMB in the 8-13in range, then and add 3-5in BG when it gets cooler. In the spring consider TShad and or GShiners. Don't take out any more adult BG for now. You need to think about forage in the 3+ in range not FH size. Here is some info on surveying pond populations.

http://msucares.com/pubs/publications/p1952.html