To start I would get a bag of GameFish Chow. It has multi sized pellets and works well for all sizes of BG. After survey results are in you can adjust product and size to fit the situation.

A note for all - if I put out GFC , AM 600 and some LMB pellets at the same time and place the BG (all sizes) will go after the large sized LMB pellets by a big factor over the GFC or AM. Not suggesting you feed BG LMB pellets but just noting the results.