I think the most important thing with feeders is to make sure you get them from a reputable supplier. we sell them in our store and I don't treat them with anything. They come in healthy, and I have never had 1 complaint from acustomer that they made their fish sick, or they weren't healthy. If you plan on having them for a while I found treating them "just in case" actually makes their life spans shorter, seems like it causes fin rot, etc. But thats just my opinion, and I have a great source for really healthy feeders. I have used Pima fix and Melafix with no ill effects, but haven't had good results with quick cure, etc.