I agree with Bill here. I did this exact same thing. I put a few (7) 15 inch bass in my pond and 250 CNBG and I catch very few GSF anymore. And I have culled about 50 GSF in that 4 to 5 inch range. This combo seems to work pretty good in reducing GSF populations.

The only difference between a rut and a Grave is the depth. So get up get out of that rut and get moving!! Time to work!!