Dwarf Lionfish not eating


Reefing newb
Hey all, I need some advice, last weekend I bought a Fuzzy Dwarf Lionfish for my 80 gal. Before we bought I had the store feed the fish, and this one had the most voracious appetite. We got him home and drip acclamated him for over 2 hours. He's off in a QT, but I've tried, frozen mysis (what the LFS fed), tried Brine, tried dipping in a feed additive, waving it in front of him, but he's not eating. Ideas?