I read in the marine newb forum someone saying that frozen food at the lfs is a waste of money and instead he uses frozen seafood like squid, scallops, fish, shrimp from the grocery store. Could you use seafood to feed FW fish, or would that be bad news? I guess FW fish aren't going to run into that stuff in the wild, so maybe not a good idea, but I was just wondering... Are there any good grocery-store foods that people use as alternatives to live/frozen lfs food for feeding their FW fish?