Jamie, I guess you have me there. I don't KNOW they need anything extra and tend to follow the masses on husbandry technique. I figure so many people advocating something, the something must hold some merit. Again, I'm told by the 'experts' that to get a tank like yours, foods like DTs needs to be added. You (and your corals/clams) obviously didn't talk to the same experts :P (anyone that's seen Jamie's tank knows he's an expert in his own right
)
In thinking about your comments, I'm actually surprised you don't add "coral food". I would have guessed you did.
Shao, you make a good point regarding sellers advocating this. Is it experience or sales speaking.
Since I have DTs and golden pearls, I'll feed it to the tank. One observation about food...I've sat for a long time and tried to see a coral polyp actually extract something from the water column, and never have.
Maybe this opens up a new thread on feeding filter/polyp feeders.