And there are none that don't eat prepared foods, if they say they ate only pods then they are lying or they have the tank hooked up to a larger system.
It's just simply not possible for a Biocube 14 to support a copepod population for a mandarin or scooter blenny to live on for any length of time. Once his belly starts to cave in you'll know he's in trouble.
Trust me, the mandarin is why I got into this hobby, and I have the same tank and I now know it's not possible to have one live a long happy life. I'm just making sure the fish will live well, and that you don't have to deal with the loss of such a beautiful fish