I have BG, YP, SMB, FHM, and RES in a pond I had redug and made larger this year. It has a yellow clay bottom with some wood structure added. I would like to add some gravel to the shallower parts 2 to 4 feet deep to provide nesting beds for the SMB. Not sure if perch use them or not. What size gravel works best? Pea gravel seems like it would move around a lot or should I go up one size to road gravel? Thanks.
