Sorry for the late response, but here goes. I understand you want big BG to fry. But if you want big BG several years from now, consider this. The biggest BG are the successful spawners. Most of their food and energy goes to spawning, not more growth. The middle sized ones don't spawn, so their food goes to more growth. If you keep the middle sizes, the bigguns keep spawning, and the remaining middle sizes keep growing. So bigger BG down the road. If you keep the biggest BG, the middle sizes start spawning sooner in their life cycle, stop growing, so you get smaller fish. 'm not saying don't keep fish, just let the biggest ones go, keep mid-sized.