I've given my indoor GF a couple of PP treatments two days apart to cure a
parasite/fungus problem. I dosed them at 3 PPM to start (Friday) and kept
the water pinkish with an extra 1 PPM every two hours. The day after
(Saturday) the first treatment the fish with the white bump had shed his
fungus patch and all the fish were much more active and hungry. One day
later (Sunday) I gave them a second dose following the same regimen. They
were all fine the next day, but by the evening the white patch had returned
to the affected fish.

I can't believe the fungus returned after the excellent results from the
first treatment. Is it possible that this is some sort of skin growth and
not the fungus returning? I had read that the PP may need several treatments
either two days apart or four days apart depending on the life cycle of the
parasite. I plan to does them again tomorrow unless suggested otherwise.

Any thoughts or alternative treatments? Nitrates seem very good at the
moment BTW, the PP seems to have done a number of the DOCs. I've also done
50% water changes between PP treatments.

TIA