feed on day one not on day 2 or 3 but again on 4 my reasin for this is that they will not know any difference but will decrease your nitrate level and enable you to have more fish, at the pet store where i work this works well
Fish are not color blind and in fact see a lot of colors. They are color blind at night since their photo receptors in their eyes basically shut down in the darkened waters. See link below for a study done on this subject.
you are that fish one eye you get killed, once dead you will be lifeless in an eternal sleep want that no don't be so stupid malicious or cruel you need your head testing