RE: Flake or Frozen
Here's something I wanted to share with you. Studies of wild "reef crest" fish, those that make up a majority that we put in reef tanks, have shown that they eat lots of volume, but very low nutrition diet. In other words, its like they are eating lots of celery and lettuce. These fish eat like sheep, not wolves.
Here's another thing to consider. What does these large feedings do to your water quality? Not only is there an issue of uneaten food, but what comes out the other end of the fish as well. If you haven't noticed, that usually happens right after a big meal. Now you have an issue of "peak" waste production. Its all being produced at one time and your filtration and other waste control processes may not be up to the task of handling this peak demand. We have a tendency to think of everything in our tanks happening in either a constant or cyclic mode. In this case that may not be the case.
Now, with that in mind, consider how we feed our fish. Basically we stick them in an all you can eat buffet once a day. I'm sure their gastrointestinal systems are not designed for the way we feed our fish. For this reason I usually suggest feeding a small quantity of a wide variety of foods several times rather then an "all you can eat" buffet. Obviously some fish will graze on stuff in the tank between feedings but ask yourself, is hair algae a varied diet? Something like Nori would be a good supplement for grazing type foods. An aquarium is obviously not a wild reef, but I think its our job to match the conditions of the reef as closely as possible for the welfare of our critters.
Gary
125 SPS, 75 gal. LPS/softie reef, 9 gal. Nano