Donski- I make a paste from Mussels, shrimp, white fish, oysters, dry fish food, mackerel, liquid coral grow & freeze in ice cube trays. I just broadcast feed the tank with this as it dissolves by rubbing it between my fingers. You get different size bits floating around to suit the tank. Every now and then I will "hand" feed each head of the Duncan and a few other corals, just so I know they are getting food. As your close enough, your welcome to grab a cube and try it out if you like. Yours really doesn't look that bad tho, I've got one here that we picked up from a closed down tank that I'm not to sure about. Will try and get a pic, he is in the sump at the moment.