Recently at my grocery I bought a whole squid (about 6" long), 5 bay scallops, 5 small raw cocktail shrimp. I chopped all of this stuff up real finely, and added a little bit of brine, and a little bit of FINELY chopped garlic. I froze it overnight. My fish love it!!!! The best part is that it cost only about $2.50. I still vary their diet with Prime Reef Flake, Shrimp/plankton pellets, and this stuff, though.
PS- My first post! woohoo