I noticed in one of my ponds most of the BG moved off the beds, I then waited 14 days and checked again and nothing on beds and YOY moved to shallow cover. So about 7 days ago I scooped up with the loader some gravel out of a creek bank that feeds the pond and took a shovel added 1 scoop to each bed to see what would happen. I only did 12 beds to test and 7 have fish back on them and 6 were RES I stocked 1 year ago that were 2-4 inch now about 5-7. I do know I seen RES on the same beds in May same area.

Iceman

Did the same thing (added gravel to existing beds) some years ago. Results below.