Mandarin - Psychedelic

[C&C]

My LPS has one of these beautiful fish and I very much want one my only problem is they want 90.00 bucks for the poor little guy, I can get one for J&L aquatics for 18.00. The real problem is that he is slowly starving to death in their tank. I have told them this to no avail, they tell me that it is eating flake food. (I have not seen it take any) It seems to be getting skinnier by the day. What to do??????????????