Keep a careful watch on the eye for signs of bacterial infection. Swelling, redness and so on. I would get a QT set up as you may need to treat with antibiotics. Be sure you keep the water quality as pristine as possible. Any amount of elevated DOC
/nutrient or nitrate can lead to opportunistic bacterial infections. Do not be afraid of doing large water changes 2x weekly, in fact I would encourage you to do so. Just be sure the new SW
is well aged/aerated and has matching chem to the display/QT tank. Make sure all foods fed are fortified with HUFA liquid vitamins and if you can find it Beta Glucan.
Do you already have a cycled QT?