I have a male cacatuoides in a 125g planted tank with a bunch of tetras and I'm having trouble getting him to eat prepared food. It's home made and everything else in the tank loves it but he wont eat it. He wont eat flake food either. If I drop in live food, i.e. black worms, he will eat some of those, but I don't want to have to constantly buy or raise live foods. Any advice?