Well in comparison I feed (granted I have DIFFERENT types of fish than you) 1 cube's worth of food every 3 days or so. My tank is a heavily stocked 90g system. Granted different types of fish eat different amounts but you are most likely way over feeding. Fish will ALWAYS act hungry and eat as often as you will feed them. In their minds they aren't sure when the next meal is coming so they eat every change they get
