Well I got a spotted mandarin a few weeks ago. My tank has been up for just over a year and I can see copepods and amphipods in the caves of the LR. I am also currently growing a culture of copepods in a separate container. The issue is that my mandarins belly is realy caved in and not plump. So I believe hes is not eating or not getting enough food. I have a six line and a bandit sleeper goby in the same tank. But yet like I said above I can see the copepods in the tank. So I feel its not that I have a shortage of food. Anyone have any advise?