Can you see the flukes? I could be ick, too
It's been a long time, but I recall the important things are to match ph and temp.
I would do some searches to make sure of that, the duration, and what to expect.
Prazipro in a hospital tank is a very effective fluke treatment too. But that's a whole'nother road. Some immediate relief is the FWD, but if there are flukes in the display tank your fish will become reinfected.