Using the garlic soaked will entice her to eat and will help her immune system. We have a Hippo Tang in a 180 that is always on the go and loves her nori.That's a good idea! I saw videos of people hanging their nori and the tang would come up to eat as much as it needs which will be good to see her eat!
As for the comment about 55 being too small, i am also aware! The tang is currently an inch big and will take time (if she survived) to outgrow the 55. At that point i would've either loved the hobby enough to expand to a permanent 100+ gallon, or shut down the hobby.
Thank you all for the advice!