Our BG are three years old now and it took them some time to find the feed.
We feed in one place on a two acre pond, and at around a pound+ apiece for the larger ones, they splash water out of the pond....
We recdently added a second Stren ADF-75D feeder for HSB, and feed high protein Aquamax 500/600 in both feeders.
It takes patience and for me that is very difficult.
N.E. Texas 2 acre and 1/4 acre ponds