The dorsal fin on the peacock has the white dot. See prior pictures please
Post a pic of dot/pimple? You don't want to throw meds at what is likely an insufficient thing before you take care of the important thing.
Mama Bear
The dorsal fin on the peacock has the white dot. See prior pictures please
Don't worry about the pimple unless it grows. It could be stress related and clean water and maybe a little salt during your treatment should clear it up... 3TBS salt per 10g will do no harm, only help...
Thanks buddy.