dwarf lion not eating

[Argentiner]

Anyone ever had any problems getting a dwarf lion to start eating. Got him from someone on canreef who said he eats everything and he just perches on something when I'm feeding. All the other fish are doing great, including a new flame angel I got about the same time. It's been about 9 days now. Tried mysis, brine, and krill. I've tried mixing them all with lipovit as well. No fish are bothering him at all and he seems very healthy. Any help or hints would be great...