I've always found it to be one of those "depends on" kinda situations. I would never suggest any course of action without knowing more about the fish load, general tank feedings as well as the specific species in question. BTA's tend to do better with a little more frequent feedings (small portions) as they are probabley a 50/50 (carb/protein) animal where others are more so carb dependant as long as the proper light environemnt is provided. Speaking mainly of hosting species commonly sold that is.
In any event, it comes down to individual species and tank feeding routines. If the tank is fed well and the anemone gets some "by catch" at each feeding, that will usually do quite well and not need much if any target feeding. The less a tank is fed, the more frequent it may be needed. The things to avoid though are large feedings on routine days with the same food types. Mix up the food type, keep the portions small/digestable and alter the times/days of the week or month the animal is fed.
Overfeeding with many species can actually stress them to death. The frequent expelling of waste and uneaten food will actually use up a great percentage of the animals stored energy reserve. At first glance, many will not recognize distressed from what is considered normal activity. More often though, the frequent release of waste is actually killing them and not normal at all. You need to find the right balance between food offered/generally fed and the light needs of a given species. There really isn't one "recipe" for all.
Cheers
Steve
