You can source the largest YP and RBS, only downside is availability and cost. Another option is caging higher qty smaller fish and growing them out on pellets. Added benefit is having pellet trained fish that grow faster and provide much faster angler return. I have grown YP to 8" in 8 months on Aqua Max, and I believe Cody and Cecil have done even better than that. Not sure RBS will take to pellets like BG, or will be more difficult like RES. Again, this project will add tremendously to the PB science archives!