Wow, killed 31 reds and spit back out....hmmm... For a short time, my tat stopped eating. It only eats live but ignored the feeders in his tank.... did not eat for 4 days... I then decided to introduce a variety of feeders, guppies, danios, etc.... the tat ate right away. Guess some tats can be finicky eaters......maybe got tired of just eating the same type of fish.... try adding different species of quality feeders.... I have found that my tat will also ignore certain feeders that are "too big". Best of luck.