One thing most people dont think about when feeding fis is that they are cold blooded. They digest food slower then other animals like humans, dogs, cats. They are more like snakes in that manner. Just cause they do eat doesnt mean they need to eat or even that its healthy. I only feed every other day and my fish are happy and healthy. Just think of a dog that you feed a whole bowl of food, then when he finishes you sit down to eat a steak...... most dogs would still look at you like they havent eaten in days and devour the steak the first chance they got.
Yeap you are right