Aquascaper
Fish Aficionado
Mandarins are lovely but my views are they should be in a quiet species tank with others of its type / Nature
Mandarins do not tolerate others of the same species in the same tank unless it's a huge tank with large amounts of live rock (general guide is 75lbs per fish). I tried two in a 100g with about 180lbs of live rock and failed as they are just too territorial.