Basicly the rule i go by is that no food hits the bottom. I feed a pinch or two (1mm NLS using thumb and first two fingers)and wait a moment. If none hits the bottom, I throw in another pinch. Pretty soon everybody has a full mouth and the first few pellets make it to the bottom. I stop there. That way everybody gets some, but nobody gets enough time to chew and swallow and try to get more. I also feed at both ends of my tank. First I put food on the right side and all the aggressive eaters start to chow down. Then I toss a pinch over to the opposite end where the more timid eaters have learned to gather. Some of the little guys just go over to the left and wait. With NLS (and the other top quality foods) being such concentrated nutrition, each fish will get full nutrition with only a couple of pellets. Their eyes are much bigger than their stomachs. Too much food just makes it move faster through their gut and out the other end.