okay so i have a rtc hybrid ive had for like almost 5 months, and hes gone from less than 2 inches to like a SOLID 14". he was eating cichlid pellets, sticks, massivore, tilapia, and shrimp with an occasional couple big goldfish. i just moved him from his 40b growout, to my 500g tank. he thrashed and was a little stressed during the move, but he only needed to go like 3 feet. hes out and about but wont eat anything. i dont know if its the different water conditions, or different substrate, or what but hes in with prob 100 goldfish, and wont touch shrimp or massivore. its been 3 days and he wont touch food, he sucks up massivore, but spits it out. what is irresistable to these guys? i just need him to eat and hes making me nervous since he would smash anything and everything before! please help