Stocked mine at 6”, other than natural forage, my fish get fed Aquamax MVP. I feel that is a very diverse product for all pond fish. I hand throw some Skreeting 9.5mm pellets on top (no idea what species is eating what)
In 10 months a had 19” CC weighing in at just over 3#.
Haven’t targeted or caught one since August, so no idea where they are now