tim000,
Most mandarins will NOT accept prepared foods, therefore they need lots of small live foods such as copepods, which is all I've seen mine eat other than frozen brine shrimp. BTW brine shrimp aren't the most nutritious food item, unless they're gut loaded or soaked in Selcon/vitamins.
In order to maintain the live foods that your mandarin will need, you need a tank with lots of live rock(~100 lbs), a DSB and refugium probably wouldn't hurt either and no other competitors for the food supply.
I made the mistake of putting a very small mandarin in my tank early on, she is doing fine but I believe she has put a dent in the copepod population. Amazingly the first time I put frozen brine in the tank she fattened up quickly with it. I'm going to try some other foods like frozen mysis.
I also added a pair of peppermint shrimp with hopes their breeding would give the mandarin live food. She has ignored the young shrimp as far as I've seen. There is a survey on both types of mandarins done earlier this year in the reefs.org survey section, check it out before you make a decision. HTH
[ October 07, 2001: Message edited by: fishfarmer ]