I am defenatly no authority on Mandarians ,I would never go out to buy one with out at least reading on their food and habitat, I have raised three so far over the years and all in a 55 gall tank.
One lived 2 years, one lived 3 years and one didnt make it 6 months.
After reading the coments I would agree with most all of them , If I may add in the fact that you should have the means to also raise amphipods as well as copepods for their food, the mandarian seems to enjoy the young amphipods as well from what I have noticed, at least in MY tank.
I also have a shrimp hatchery that pnce a week I add eggs to and let them hatch ,, right inside the tank,, The damsles love it and seem to know whe the new ones are hatching.
I have one now in a 30 gallon tank ,,,it has been there going on 3 months, I have 3 other fish in the tank, ,,,all damsles,,,, 1 serpant star,,,,, several snails and one zenia coral cluster.
There is ample live rock and it is managed in a way that make it impossible for any of the fish to get into, I also have places for the fish to ocupy and hide out in..
It has a ssb 1/2 in or so deep .
I also do as sugested and that is I raise copepods in a seperate holding area, I use a 5 gallong round water jug with the top cut off and a air hoes with air stone on it that I can regulate the air flow.I put a bunch of old snbail shells and a bit of sand in the bottom, I also use tank water from water changes to add to the copepod tank .
So far so good, the little fella does seem to get hungry enough to eat some of the mysis shrimp that I add in the frozen mix , but like you guys said , he would rather pick pods off the rocks, When the lights are off I can see copepods swiming around in the tank,.
I started out with a coulture of several thousand in this tank , it was runing about 4 months when My daughter brough the fish over, some one told her they heard it wouldnt live and they wanted rid of it , they told her it cost too much to keep, of coarse she told them she wold take it because her dad raised them b4.
Not that I would heve turned down the chalenge and they are a wonderfully colord adition to the tank.
I lost the first two mandarians I had do to the issue we had with the tanks as I described in my first thread.
If you are considering raising one I would sugest to basicaly just allow them to aclimate slowly , they are verry slitary unless they chose not to be,, give them a few days with out disturbing them toomuch, they are also verry courious critters . make sure your tank can support the food they need and to allow them as many hiding places as possible ,,I have a good freind who has had 2 of them now for almost a year and so far so good .
One in a 55 gallon and one in a a 75 gal.
Also IMO,,I have no documentation or evidence,,,,If your tank is infested with bristle worms and or certain crabs you may not have much luck, I have noticed a mandarian likes to sleep after the lights go out ,, I know , thats when they come put in the wild!!!, the one I have now will actualy turns colors at night like a camilion lizard does,, when the lights are off , he looks like he is dead and decaying ,pittyfull looking ,,,,I never seen my others do this .
He / she seems to like laying in the sand or curled up in a quiet place in the rocks untill the lights cone on, I have no crabs or anything that will atack it while it is in this state in my thank .
Maybe a couple bristle worms but they seem to stay in the live rock, I have never found them in the sand bed.
I dont know if this helps , I just felt like comenting.
Bill