tyler if you want to maintain the red color, I would try to stick with like colored foods. like cyclops, brine shrimp (even though they have very little nutritional value.) Formula 1.... you get the picture. I have noticed that in my experience, however limited it is. Corals get most of there color from what they are eating. I have been trying to play around with this concept. I have a couple heads of duncans, that i have been feeding each head a different "color" diet. I have only been doing this for two weeks now, however when I get more concreat results I will post in these forums. So far all the heads that I have denied green foods, have begun to "bleach. More like the green
center portion, has lost some luster, and begun to match the tentacles purple color. Could be coincidental. I look forward to letting you all know the results.