Yes, you would treat them as any other new fish.
< step up on the soap box for a minute...
I am not an advocate of treating a fish prophylactically for disease or parasites. All treatments, involving meds, are stressfull on the fish, IMO
, you just may cause the ick you are trying to prevent. If it were mine, I would make the quarantine tank as stress free as possible...matching water parameters with that of the main tank, and feed a good healthy diet. Observe the fish for 3 weeks, then if it shows signs of an infection I would treat the infection...
<steps off the soap box
So how about a few pics of the new fish???