Ok.
I would do a water change and start the med again.
According to the info on esha exit med you don't have to run black carbon or do water changes.
But i would do a water change and gravel vac before you start the course of meds again.
that's what i was thinking too...took out carbon from the filter when started with med first time. what can help them to recover? some vitamins ? i am really worried hate when my pets don't feel good