Mix those perch up. 10 bluegill to 2 pumkinseed. Worked fine for me. Also add a few silver shinners. Perch may cross but not always. Look at the wild, in the lakes around here there are 4 different types of perch and there a big ones and full-blooded ones. The bass dont care what they are as long as they fit in their mouth. i put 50 bluegill to 10 pumkinseed with a bunch of mousquito fish and freshwater shrimp in a tank. I put bass that were 3inches long 8 months ago and they average 1.2 pounds. I stocked the fish at the same time and the perch spawned twice which fed the bass well. So think about that combination.