Look if you dontdo something soon the foxface wont live another ick cycle , my fish eat food the day they died with all the garlic and additives you can get . I have done the ick battle and the HYPO is the best way to go and, copper is unsafe and not always work, bad side affects,
I would setup a QT tank ASAP
50% tank water
50% fresh made saltwater
let it run for 24 hours and start trying to catch ur fish ,
I have learn that making a trap out of 2 liter bottle works great for me utube has great videos,
also I would leave the DT empty for 6 weeks
I wouldnt start the hypo process for a couple of days to allow the fish to get used to the new tank
I wouldnt turn the lights on day one either, but I would fill the tank with PCV pipes and someother hiding places
I have a old castle that is from the 90s I threw in mine they always seem to love something to hide in.
after the hypo process the main tank should be ick free
if u did all the steps right in the hypo in the QT to rid all the unseen ick away from ur fish
GL and in the end no fish can beat ick