Heather is giving excellent advice. Follow it to the letter.

Lack of eating is most likely due to the move. Using the bowl trick is a good idea, but it may also stress the frog because it is not used to this feeding method let alone a strange object being added to an already unfamiliar environment(hospital tank).

Using the water treatment you mentioned, buying liquid calcium and adding it to the water dish, and doing an electrolyte replacement soak will help greatly. You can also add a couple drops of honey to the electrolyte soak to give a boost of energy so that she isn't so lethargic.

Keep a close eye on her and look for an abnormalities in the skeletal structure. Especially in the legs and around the mouth. Signs of MBD will show their first if it is effecting the frog's bones. Drooping jaw, severe underbite, severe overbite, ect.

Keep us posted.