I diagree. I think you can overfeed a coral because I did and so has a freind of mine. I told him no, no you can't over feed a coral because I am a more advanced hobbists than he. We work together and he kind of avoided a few of our regular reef chat sessions. I fed my acans some frozen foods as I do pretty much everyday and man they just looked so hungry still so I feed some powdered foods every once and a while so I fed them some powdered food after the frozen foods. The next morning all looked ok, but a few polyps on each one of my acans were slightly closed up or only half closed up. Some stuff that looked like detritus was coming out of them. I blew it off and this continued for about 1-2 weeks. They did recover and are fine. I was so freaked because these are extremely nice colored rare aussie lords with about 20 heads on each colony worth about $200.00 per colony and all 3 of my colonies were like this. I was so freaked that I literally thought I was going to throw up. So I hunted my freind down and told him what had happened he said same thing happened to me and thats why I have been avoiding you, I did not want to tell you my mistake. He said 3-5 days later his recovered. Mine took a bit longer, but I really feel that you can over feed a coral. So all should be careful. I feed mine probably 5 days per week now. Hope this helps all.