You could always get lucky with an ORA mandarin that will eat prepared. it works out for some people, though they have been known to revert to pods quite often. I'm considering a mandarin myself, but if I did get one, I would make sure it was eating what it should be in the LFS before buying. In a large tank. there might be enough pods to support a mandarins should it stop eating prepared. Also, since they are used to constantly grazing on pods, they will need to be fed several times a day. Be prepared for that.
--Adeeb