are you still treating the hospital tank? done any water changes on it? now you've added another tank to the mix, we've no idea what sort of exposure the fish is getting the medication or...well, anything....making it all sounds like a pointless/fruitless exercise....i'm lost.
i'd stop the medication, the week without medication is downtime for your fish, to recover from the dosage before they go through another week of treatment. Medication causes stress, gotta give them time out.
I agree with tizer.
Also I would think about changing medication.
Hope do the fish look now?
Anti whitespot medication by interpet. Check booklet instructions to see if you have to half dose with sensitive fish.
Only had whitespot once and I used anti whitespot medication by interpet. It was that long ago I have forgotten the instructions for the medication.
You need to preform a gravel vac, 50% water change. Then add some new black carbon to filter for 2 days.
After 2 days is up you will than have to do the following -
Preform a gravel vac and water change, Remove black carbon from filter.
Raise temp, and increase aeration,. Then add the medication to the tank.