I also have a 3/4 acre pond that was dug in July. I spoke with multiple biologist and experts from here. An average of those responses would be 50 LMB, 1,000 BG, 0 Cats. If you insist on Catfish then reduce the number of LMB as they are predators also and although they eat fish food, they will also prey on the BG.

I am only doing LMB and BG in my pond and BG and CC in my dads pond right down the road.

3/4 Acre South Georgia Pond, 1,500 BG/RES; LMB coming soon

Father, forgive them: for they know not what they do.

Most powerful words ever spoken.
(Jesus Christ in Luke 23:34)