no thats not right,the spots are result of the parasite,at night the parasites drop off the host and basically breed,They multiply an awful lot.They then try to find another host a little while later,this can take days to weeks,becase the fall off at night its normally at the place your fish will rest for the night and will probably be the first again to be infected but not the last.the fish will again start darting around and rubbing itself against rock,glass or pipes,which is when you see scratch marks all over the fish,this process keeps happening until the parasites are destroyed.qt the fish,treat them and leave the tank empty for 8 weeks.
There are a lot of reef friendly treatments out there which may work,I'm trying one now,not sure if it will work but trying this before having to really stress my fish out trying to catch them.
Old Chinese proverb:
Don't go to bed with ichy bum
wake up with smelly finger!!