I have a 1.5 acre pond that I stocked with 40lb of Fatheads and 20Lb of GS last year along with 500 YP. I am adding pellet trained SMB tomorrow. I ordered 100 and am looking forward to them being added however I am getting a little nervous. My perch have gotten fairly large. On Saturday I caught 12 and 10 of them were over 10" with the largest being 12". How big would the SMB need to be to ensure they won't be an expensive meal for my perch?

I believe the SMB will be 3-4"
Thanks in advance