Nothing can stressed me out than copperban butterfly fish in this hobby

[NicoleZZZ]

I had an unsuccessful experience before with a cooperban that fail to eat. He was ended up dying just within one week after got to my home with no eating and pecking behaviour at all.

For this time I watched tons of youtube video and researched quite a bit. I thought I was ready, and eventually picked this guys that looks healthy in fish store.

I put him in the quarantine tank with low salinity. At the first few days he tries to eat mysis but spit it out. I was happy to see this behaviour. However he now just ignoring the mysis. I have also tried clam, flakes, brine, mashed seafood mix and fill in Syringe. same results as being ignored.

I can literally see he is becoming skinnier and skinnier. He refuses the frozen food but spending all day looking for foods in between the rocks. My quarantine tank runs for low salinity so there shouldnt any pods and aiptasia available for him.

Now I dont know what else I could do to make him eat.Please HELP!!!!!