I was looking around on the food dicussion and ran into the link to http://www.epicureanhermit.com/ . I ran into the story about copper sulfate and thought that i would investigate the food that i feed, which is FMR. Sure enough, there it was in the ingredients and iron sulfate too( not sure if that is as bad as CuS2). I thought FMR was a trusted brand. It is harped about in most web pages that i have come across. So my question is what is the best store bought food to feed or is the best option to make homeade stuff?