This is a long thread so i didnt get a chance to read all of it but if it has not been mentioned, mixing food is a good way to train them. For instance shread shrimp and mix it with blood worms, etc with other foods and bloodworms. Seems like all fish love bloodworms so thats a good mixer and this method seems to work with all fish, for me atleast. If this has been mentioned sorry for the redundancy. =)