LF :food ideas for a black boxfish

[Skimmer Juice]

Bought a nice healthy looking black boxfish . Currently in QT the only thing it seems to eat is feather dusters. It has a few small specs on her fin's. So I want to treat her so I can add her to my display . Not much info on these fish in captivity , I have bought a couple in the past but could never get them to eat anything. So now I got her eating feather dusters I feel like I might be able to keep this fish.

Currently looking for a product called Nutramar Ova (prawn eggs) anybody know anywhere in canada I could order this food.? Or any ideas for some other types of food they might be good to try. Any coral I could sacrafice just to get her well fed , I want to treat her but want to wait till she is eating well before possibly stressing her out with cupramine.