If he's in the pond that's feasible. I found that mine grew fastest eating pellets and storebought foods. I tried getting him on massivore but he rejects it now. All he wants is shrimp and fish. Storebought foods have all the nutrients and vitamins to help them pack on size. Water temp is key here as well. Warmer waters keep their metabolism up. I noticed almost a standstill in growth when I went from 82* to 75*.
