trust me its not uneatten food. i have 5 black neon tetras(it was 7 but a black out without proper agitation killed 2, oops) and 6 lampeyes(AWESOME FISH) as well as 2 nirites and approx 10 shrimp(forget the type, one is prego). No food goes uneatten. lol. Those lampeyes devour food.
I just did a true blackout for 2 days. almost destoyed it all.