Fish food is a huge topic in aquarium keeping. Just like human food there is no "majic bullet" that will meet the dietary requirements of all livestock. Variety is the key. While most fish are classified as carnivours or herbivours, almost all become omnivours in captivity. They key is to offer a variety of food coupled with good dietary suppliments such as garlic, vita-chem, selcon, zoe and plankton. I feed Rod's food (Rod's Food - The Complete Reef Food
) Selcon, DT's phytoplankton and garlic to my reefs. The Rod's food is really like a blender mush you do not have to make yourself. The rest offer plankton, vitamins, HUFA's and garlic. I also hang nori sheets daily for my tangs. Over the years I have learned that "fish" food goes far beyond the regular flake and fozen foods on the market.