good invertabrate-live rock food??

[lmh11706]

just recived part 1 of the package from tampa bay saltwater-in my tank 48hrs-and the life is abundant[although i already know i have a mantis and i think a gorilla crab or two-just saw the claws so far-theyre small]lots of feather dusters-and other things i dont know what-anyway what is a good live rock-filter feeding food-the 75lbs of rock and 75lbs of live sand are the first things in the tank