i feed about 75% for my red aro. i leave him a bit hungry. rtg i dont really care lol. i think if i feed the red too much, the colour wont catch up to size. i see a lot of red aros out there that is very bulky but lack the colour. so far so good with my chilli.
i also dont feed any of my fish 1 day of the week. just so there is a small rest period.